summaryrefslogtreecommitdiffstats
path: root/Documentation/RCU
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-06-29 04:52:01 +0200
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-01-15 06:28:58 +0100
commite73c14ebc36bf2ba28784ff05133283003aaafdb (patch)
tree58f86c9bb7d411024b04fa4b6c6441cd020ce16c /Documentation/RCU
parentrcu: Narrow early boot window of illegal synchronous grace periods (diff)
downloadlinux-e73c14ebc36bf2ba28784ff05133283003aaafdb.tar.xz
linux-e73c14ebc36bf2ba28784ff05133283003aaafdb.zip
rcu: Design documentation for expedited grace periods
This commit adds design documentation for expedited grace periods. This documentation is in HTML rather than the new documentation format because (1) I have prototype documentation already in HTML, and (2) Attempting to learn the new documentation format while creating the design documentation seems likely to result in neither happening in a timely fashion. Once the design documentation is complete, we can start a conversion effort. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'Documentation/RCU')
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg830
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg826
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html626
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg275
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg275
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg287
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg323
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg323
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg335
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg335
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg347
-rw-r--r--Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg311
12 files changed, 5093 insertions, 0 deletions
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg
new file mode 100644
index 000000000000..7c6c90bd02c9
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg
@@ -0,0 +1,830 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Creator: fig2dev Version 3.2 Patchlevel 5e -->
+
+<!-- CreationDate: Wed Dec 9 17:39:46 2015 -->
+
+<!-- Magnification: 3.000 -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="952.6817"
+ height="1219.6219"
+ viewBox="-66 -66 12729.905 16296.808"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="ExpRCUFlow.svg">
+ <metadata
+ id="metadata94">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <defs
+ id="defs92">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path4146"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow1Mend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow1Mend"
+ style="overflow:visible">
+ <path
+ id="path3852"
+ d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+ style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+ transform="matrix(-0.4,0,0,-0.4,-4,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow1Mend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow1Mend-9"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path3852-7"
+ d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+ style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+ transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-7"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-6"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-1"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-16"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-8"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-160"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-5"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-78"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-66"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-8"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-56"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-19"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-89"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-85"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-3"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-73"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-55"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-5"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-88"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-198"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-2"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-22"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="marker5072"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path5074"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-87"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-63"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-6"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-26"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-0"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-51"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1"
+ objecttolerance="10"
+ gridtolerance="10"
+ guidetolerance="10"
+ inkscape:pageopacity="0"
+ inkscape:pageshadow="2"
+ inkscape:window-width="1090"
+ inkscape:window-height="1148"
+ id="namedview90"
+ showgrid="true"
+ inkscape:zoom="0.80021373"
+ inkscape:cx="462.49289"
+ inkscape:cy="623.19585"
+ inkscape:window-x="557"
+ inkscape:window-y="24"
+ inkscape:window-maximized="0"
+ inkscape:current-layer="g4"
+ inkscape:snap-grids="false"
+ fit-margin-top="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5"
+ fit-margin-left="5" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4"
+ transform="translate(23.312813,523.41305)">
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465-->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 7875 225 - 10665 225-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9675 675 - 7785 675-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475-->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215-->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <g
+ id="g4104"
+ transform="translate(-1068.9745,0)">
+ <rect
+ transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+ y="-7383.8755"
+ x="-6124.8989"
+ height="1966.2251"
+ width="1953.6969"
+ id="rect3032-1-0"
+ style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4098"
+ y="818.40338"
+ x="8168.2671"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="818.40338"
+ x="8168.2671"
+ id="tspan4100"
+ sodipodi:role="line">Idle or</tspan><tspan
+ id="tspan4102"
+ y="1152.4579"
+ x="8168.2671"
+ sodipodi:role="line">offline?</tspan></text>
+ </g>
+ <g
+ id="g4114"
+ transform="translate(0,147.96969)">
+ <rect
+ id="rect6"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ id="tspan4112"
+ sodipodi:role="line">CPU N Start</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 4432.5052,897.4924 5684.8749,880.79414"
+ id="path4119"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 8503.0006,874.12161 9755.3703,857.42334"
+ id="path4119-8"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="8617.0977"
+ y="705.50983"
+ id="text4593"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595"
+ x="8617.0977"
+ y="705.50983">Y</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9"
+ transform="translate(9722.4732,131.27105)">
+ <rect
+ id="rect6-0"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="0"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5"
+ y="835.11212"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="1460.1007"
+ id="tspan4112-9"
+ sodipodi:role="line">Done</tspan></text>
+ </g>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-5"
+ transform="translate(0,3705.3456)">
+ <rect
+ id="rect6-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-9"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ sodipodi:role="line"
+ id="tspan4776">Send IPI to CPU N</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 7102.5627,2263.5171 4430.8404,3682.8694"
+ id="path4119-3"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4104-1"
+ transform="translate(-1065.3349,6403.5782)">
+ <rect
+ transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+ y="-7383.8755"
+ x="-6124.8989"
+ height="1966.2251"
+ width="1953.6969"
+ id="rect3032-1-0-6"
+ style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4098-3"
+ y="482.00006"
+ x="8168.2671"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ id="tspan4102-8"
+ y="482.00006"
+ x="8168.2671"
+ sodipodi:role="line">In RCU</tspan><tspan
+ y="816.05457"
+ x="8168.2671"
+ sodipodi:role="line"
+ id="tspan4833">read-side</tspan><tspan
+ y="1150.109"
+ x="8168.2671"
+ sodipodi:role="line"
+ id="tspan4835">critical</tspan><tspan
+ y="1484.1636"
+ x="8168.2671"
+ sodipodi:role="line"
+ id="tspan4837">section?</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="6463.0864"
+ y="2285.6765"
+ id="text4593-0"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-6"
+ x="6463.0864"
+ y="2285.6765">N</tspan></text>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 2189.1897,5219.361 16.6983,1252.3697"
+ id="path4119-0"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-5-2"
+ transform="translate(0,6551.5479)">
+ <rect
+ id="rect6-1-7"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-9-5"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ sodipodi:role="line"
+ id="tspan4776-5">IPI Handler</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="m 4432.5052,7297.9678 1252.3697,-16.6982"
+ id="path4119-2"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="m 8503.0013,7278.6595 1252.369,-16.6982"
+ id="path4119-8-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="8617.0977"
+ y="7110.0186"
+ id="text4593-4"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-0"
+ x="8617.0977"
+ y="7110.0186">N</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3"
+ transform="translate(9722.4732,6535.809)">
+ <rect
+ id="rect6-0-7"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7"
+ y="503.71591"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="503.71591"
+ x="1460.1007"
+ id="tspan4112-9-0"
+ sodipodi:role="line">Report CPU</tspan><tspan
+ y="837.77039"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4923">Quiescent</tspan><tspan
+ y="1171.825"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925">State</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 7102.5627,8725.7454 16.6983,1252.3697"
+ id="path4119-0-0"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="6797.0522"
+ y="9018.6807"
+ id="text4593-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-2"
+ x="6797.0522"
+ y="9018.6807">Y</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8"
+ transform="translate(-80.17308,11381.108)">
+ <rect
+ id="rect6-0-7-5"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1">rcu_read_unlock()</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 1362.6256,10071.26 16.6983,1252.369"
+ id="path4119-0-0-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 1362.6256,12883.919 16.6983,1252.369"
+ id="path4119-0-0-7-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8-1"
+ transform="translate(9722.4732,11389.458)">
+ <rect
+ id="rect6-0-7-5-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6-2"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1-2">Context Switch</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 11165.272,10071.26 16.698,1252.369"
+ id="path4119-0-0-7-8"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-9"
+ transform="translate(-80.17308,14163.046)">
+ <rect
+ id="rect6-0-7-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-3"
+ y="503.71591"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="503.71591"
+ x="1460.1007"
+ id="tspan4112-9-0-4"
+ sodipodi:role="line">Report CPU</tspan><tspan
+ y="837.77039"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4923-3">and Task</tspan><tspan
+ y="1171.825"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-9">Quiescent States</tspan></text>
+ </g>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8-1-8"
+ transform="translate(5663.2978,11389.458)">
+ <rect
+ id="rect6-0-7-5-1-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6-2-4"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1-2-4">Enqueue Task</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 9827.612,12141.988 8575.243,12125.29"
+ id="path4119-8-7-5"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 7106.0965,12818.962 16.6983,1252.369"
+ id="path4119-0-0-7-7-5"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-9-2"
+ transform="translate(5663.2978,14098.088)">
+ <rect
+ id="rect6-0-7-1-8"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-3-4"
+ y="503.71591"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="503.71591"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4923-3-2">Report CPU</tspan><tspan
+ y="837.77039"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-9-9">Quiescent</tspan><tspan
+ y="1171.825"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan5239">State</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="M 5733.305,14095.542 2761.014,12809.774"
+ id="path4119-0-0-2"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0"
+ d="m 1353.3524,10079.499 9701.6916,0 100.189,-16.698"
+ id="path5265"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="ccc" />
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg
new file mode 100644
index 000000000000..e4233ac93c2b
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg
@@ -0,0 +1,826 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Creator: fig2dev Version 3.2 Patchlevel 5e -->
+
+<!-- CreationDate: Wed Dec 9 17:39:46 2015 -->
+
+<!-- Magnification: 3.000 -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="952.6817"
+ height="1425.6191"
+ viewBox="-66 -66 12729.905 19049.38"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="ExpSchedFlow.svg">
+ <metadata
+ id="metadata94">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <defs
+ id="defs92">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path4146"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow1Mend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow1Mend"
+ style="overflow:visible">
+ <path
+ id="path3852"
+ d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+ style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+ transform="matrix(-0.4,0,0,-0.4,-4,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow1Mend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow1Mend-9"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path3852-7"
+ d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+ style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt"
+ transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-7"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-6"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-1"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-16"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-8"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-160"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-5"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-78"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-66"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-8"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-56"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-19"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-89"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-85"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-3"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-73"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-55"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-5"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-88"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-198"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-2"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-22"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="marker5072"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path5074"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-87"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-63"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-6"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-26"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-0"
+ style="overflow:visible">
+ <path
+ inkscape:connector-curvature="0"
+ id="path4146-51"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-58"
+ style="overflow:visible">
+ <path
+ id="path4146-61"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1"
+ objecttolerance="10"
+ gridtolerance="10"
+ guidetolerance="10"
+ inkscape:pageopacity="0"
+ inkscape:pageshadow="2"
+ inkscape:window-width="1090"
+ inkscape:window-height="1148"
+ id="namedview90"
+ showgrid="true"
+ inkscape:zoom="0.80021373"
+ inkscape:cx="462.49289"
+ inkscape:cy="473.6718"
+ inkscape:window-x="770"
+ inkscape:window-y="24"
+ inkscape:window-maximized="0"
+ inkscape:current-layer="g4114-9-3-9"
+ inkscape:snap-grids="false"
+ fit-margin-top="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5"
+ fit-margin-left="5" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4"
+ transform="translate(23.312814,523.41265)">
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465-->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 7875 225 - 10665 225-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9675 675 - 7785 675-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175-->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475-->
+ <!-- Line: box -->
+ <!-- Line -->
+ <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215-->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <!-- Text -->
+ <g
+ id="g4104"
+ transform="translate(-1068.9745,0)">
+ <rect
+ transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+ y="-7383.8755"
+ x="-6124.8989"
+ height="1966.2251"
+ width="1953.6969"
+ id="rect3032-1-0"
+ style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4098"
+ y="818.40338"
+ x="8168.2671"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="818.40338"
+ x="8168.2671"
+ id="tspan4100"
+ sodipodi:role="line">Idle or</tspan><tspan
+ id="tspan4102"
+ y="1152.4579"
+ x="8168.2671"
+ sodipodi:role="line">offline?</tspan></text>
+ </g>
+ <g
+ id="g4114"
+ transform="translate(0,147.96969)">
+ <rect
+ id="rect6"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ id="tspan4112"
+ sodipodi:role="line">CPU N Start</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 4432.5052,897.4924 5684.8749,880.79414"
+ id="path4119"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 8503.0006,874.12161 9755.3703,857.42334"
+ id="path4119-8"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="8617.0977"
+ y="705.50983"
+ id="text4593"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595"
+ x="8617.0977"
+ y="705.50983">Y</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9"
+ transform="translate(9722.4732,131.27105)">
+ <rect
+ id="rect6-0"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="0"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5"
+ y="835.11212"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="1460.1007"
+ id="tspan4112-9"
+ sodipodi:role="line">Done</tspan></text>
+ </g>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-5"
+ transform="translate(0,3705.3456)">
+ <rect
+ id="rect6-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-9"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ sodipodi:role="line"
+ id="tspan4776">Send IPI to CPU N</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="M 7102.5627,2263.5171 4430.8404,3682.8694"
+ id="path4119-3"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4104-1"
+ transform="translate(-1065.3349,6403.5782)">
+ <rect
+ transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)"
+ y="-7383.8755"
+ x="-6124.8989"
+ height="1966.2251"
+ width="1953.6969"
+ id="rect3032-1-0-6"
+ style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4098-3"
+ y="985.4306"
+ x="8168.2671"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="985.4306"
+ x="8168.2671"
+ sodipodi:role="line"
+ id="tspan3109">CPU idle?</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="6463.0864"
+ y="2285.6765"
+ id="text4593-0"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-6"
+ x="6463.0864"
+ y="2285.6765">N</tspan></text>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 2189.1897,5219.361 16.6983,1252.3697"
+ id="path4119-0"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-5-2"
+ transform="translate(0,6551.5479)">
+ <rect
+ id="rect6-1-7"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1475.6636"
+ width="4401.7612"
+ y="0"
+ x="0" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-9-5"
+ y="835.11212"
+ x="2206.4917"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="835.11212"
+ x="2206.4917"
+ sodipodi:role="line"
+ id="tspan4776-5">IPI Handler</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="m 4432.5052,7297.9678 1252.3697,-16.6982"
+ id="path4119-2"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)"
+ d="m 8503.0013,7278.6595 1252.369,-16.6982"
+ id="path4119-8-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="8617.0977"
+ y="7110.0186"
+ id="text4593-4"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-0"
+ x="8617.0977"
+ y="7110.0186">Y</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3"
+ transform="translate(9722.4732,6535.809)">
+ <rect
+ id="rect6-0-7"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7"
+ y="503.71591"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="503.71591"
+ x="1460.1007"
+ id="tspan4112-9-0"
+ sodipodi:role="line">Report CPU</tspan><tspan
+ y="837.77039"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4923">Quiescent</tspan><tspan
+ y="1171.825"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925">State</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 7102.5627,11478.337 16.6983,1252.35"
+ id="path4119-0-0"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="6797.0522"
+ y="9018.6807"
+ id="text4593-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4595-2"
+ x="6797.0522"
+ y="9018.6807">N</tspan></text>
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8"
+ transform="translate(-80.17308,14133.68)">
+ <rect
+ id="rect6-0-7-5"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1">Context Switch</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 1362.6256,12823.832 16.6983,1252.369"
+ id="path4119-0-0-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 1362.6256,15636.491 16.6983,1252.369"
+ id="path4119-0-0-7-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8-1"
+ transform="translate(9722.4732,14142.03)">
+ <rect
+ id="rect6-0-7-5-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6-2"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1-2">CPU Offline</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 11165.272,12823.832 16.698,1252.369"
+ id="path4119-0-0-7-8"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-9"
+ transform="translate(-80.17308,16915.618)">
+ <rect
+ id="rect6-0-7-1"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-3"
+ y="505.47754"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="505.47754"
+ x="1460.1007"
+ id="tspan4112-9-0-4"
+ sodipodi:role="line">Report CPU</tspan><tspan
+ y="839.53204"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-9">Quiescent</tspan><tspan
+ y="1173.5865"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan3168">State</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 11165.272,15571.534 16.698,1252.369"
+ id="path4119-0-0-7-7-5"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-9-2"
+ transform="translate(9722.4732,16850.66)">
+ <rect
+ id="rect6-0-7-1-8"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-3-4"
+ y="503.71591"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="503.71591"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4923-3-2">Report CPU</tspan><tspan
+ y="837.77039"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-9-9">Quiescent</tspan><tspan
+ y="1171.825"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan5239">State</tspan></text>
+ </g>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0"
+ d="m 1353.3524,12832.071 9701.6916,0 100.189,-16.698"
+ id="path5265"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="ccc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)"
+ d="m 7112.6465,8669.1867 16.6983,1252.369"
+ id="path4119-0-0-7-7-5-7"
+ inkscape:connector-curvature="0"
+ sodipodi:nodetypes="cc" />
+ <g
+ style="fill:none;stroke-width:0.025in"
+ id="g4114-9-3-8-1-8-3"
+ transform="translate(5663.1399,9972.3627)">
+ <rect
+ id="rect6-0-7-5-1-1-9"
+ style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none"
+ rx="0"
+ height="1425.5687"
+ width="2748.6331"
+ y="29.467337"
+ x="80.17308" />
+ <text
+ sodipodi:linespacing="125%"
+ id="text4110-5-7-6-2-4-0"
+ y="841.88086"
+ x="1460.1007"
+ style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ xml:space="preserve"><tspan
+ y="841.88086"
+ x="1460.1007"
+ sodipodi:role="line"
+ id="tspan4925-1-2-4-5">reched_cpu()</tspan></text>
+ </g>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
new file mode 100644
index 000000000000..7a3194c5559a
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html
@@ -0,0 +1,626 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+ <html>
+ <head><title>A Tour Through TREE_RCU's Expedited Grace Periods</title>
+ <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+
+<h2>Introduction</h2>
+
+This document describes RCU's expedited grace periods.
+Unlike RCU's normal grace periods, which accept long latencies to attain
+high efficiency and minimal disturbance, expedited grace periods accept
+lower efficiency and significant disturbance to attain shorter latencies.
+
+<p>
+There are three flavors of RCU (RCU-bh, RCU-preempt, and RCU-sched),
+but only two flavors of expedited grace periods because the RCU-bh
+expedited grace period maps onto the RCU-sched expedited grace period.
+Each of the remaining two implementations is covered in its own section.
+
+<ol>
+<li> <a href="#Expedited Grace Period Design">
+ Expedited Grace Period Design</a>
+<li> <a href="#RCU-preempt Expedited Grace Periods">
+ RCU-preempt Expedited Grace Periods</a>
+<li> <a href="#RCU-sched Expedited Grace Periods">
+ RCU-sched Expedited Grace Periods</a>
+<li> <a href="#Expedited Grace Period and CPU Hotplug">
+ Expedited Grace Period and CPU Hotplug</a>
+<li> <a href="#Expedited Grace Period Refinements">
+ Expedited Grace Period Refinements</a>
+</ol>
+
+<h2><a name="Expedited Grace Period Design">
+Expedited Grace Period Design</a></h2>
+
+<p>
+The expedited RCU grace periods cannot be accused of being subtle,
+given that they for all intents and purposes hammer every CPU that
+has not yet provided a quiescent state for the current expedited
+grace period.
+The one saving grace is that the hammer has grown a bit smaller
+over time: The old call to <tt>try_stop_cpus()</tt> has been
+replaced with a set of calls to <tt>smp_call_function_single()</tt>,
+each of which results in an IPI to the target CPU.
+The corresponding handler function checks the CPU's state, motivating
+a faster quiescent state where possible, and triggering a report
+of that quiescent state.
+As always for RCU, once everything has spent some time in a quiescent
+state, the expedited grace period has completed.
+
+<p>
+The details of the <tt>smp_call_function_single()</tt> handler's
+operation depend on the RCU flavor, as described in the following
+sections.
+
+<h2><a name="RCU-preempt Expedited Grace Periods">
+RCU-preempt Expedited Grace Periods</a></h2>
+
+<p>
+The overall flow of the handling of a given CPU by an RCU-preempt
+expedited grace period is shown in the following diagram:
+
+<p><img src="ExpRCUFlow.svg" alt="ExpRCUFlow.svg" width="55%">
+
+<p>
+The solid arrows denote direct action, for example, a function call.
+The dotted arrows denote indirect action, for example, an IPI
+or a state that is reached after some time.
+
+<p>
+If a given CPU is offline or idle, <tt>synchronize_rcu_expedited()</tt>
+will ignore it because idle and offline CPUs are already residing
+in quiescent states.
+Otherwise, the expedited grace period will use
+<tt>smp_call_function_single()</tt> to send the CPU an IPI, which
+is handled by <tt>sync_rcu_exp_handler()</tt>.
+
+<p>
+However, because this is preemptible RCU, <tt>sync_rcu_exp_handler()</tt>
+can check to see if the CPU is currently running in an RCU read-side
+critical section.
+If not, the handler can immediately report a quiescent state.
+Otherwise, it sets flags so that the outermost <tt>rcu_read_unlock()</tt>
+invocation will provide the needed quiescent-state report.
+This flag-setting avoids the previous forced preemption of all
+CPUs that might have RCU read-side critical sections.
+In addition, this flag-setting is done so as to avoid increasing
+the overhead of the common-case fastpath through the scheduler.
+
+<p>
+Again because this is preemptible RCU, an RCU read-side critical section
+can be preempted.
+When that happens, RCU will enqueue the task, which will the continue to
+block the current expedited grace period until it resumes and finds its
+outermost <tt>rcu_read_unlock()</tt>.
+The CPU will report a quiescent state just after enqueuing the task because
+the CPU is no longer blocking the grace period.
+It is instead the preempted task doing the blocking.
+The list of blocked tasks is managed by <tt>rcu_preempt_ctxt_queue()</tt>,
+which is called from <tt>rcu_preempt_note_context_switch()</tt>, which
+in turn is called from <tt>rcu_note_context_switch()</tt>, which in
+turn is called from the scheduler.
+
+<table>
+<tr><th>&nbsp;</th></tr>
+<tr><th align="left">Quick Quiz:</th></tr>
+<tr><td>
+ Why not just have the expedited grace period check the
+ state of all the CPUs?
+ After all, that would avoid all those real-time-unfriendly IPIs.
+</td></tr>
+<tr><th align="left">Answer:</th></tr>
+<tr><td bgcolor="#ffffff"><font color="ffffff">
+ Because we want the RCU read-side critical sections to run fast,
+ which means no memory barriers.
+ Therefore, it is not possible to safely check the state from some
+ other CPU.
+ And even if it was possible to safely check the state, it would
+ still be necessary to IPI the CPU to safely interact with the
+ upcoming <tt>rcu_read_unlock()</tt> invocation, which means that
+ the remote state testing would not help the worst-case
+ latency that real-time applications care about.
+
+ <p><font color="ffffff">One way to prevent your real-time
+ application from getting hit with these IPIs is to
+ build your kernel with <tt>CONFIG_NO_HZ_FULL=y</tt>.
+ RCU would then perceive the CPU running your application
+ as being idle, and it would be able to safely detect that
+ state without needing to IPI the CPU.
+</font></td></tr>
+<tr><td>&nbsp;</td></tr>
+</table>
+
+<p>
+Please note that this is just the overall flow:
+Additional complications can arise due to races with CPUs going idle
+or offline, among other things.
+
+<h2><a name="RCU-sched Expedited Grace Periods">
+RCU-sched Expedited Grace Periods</a></h2>
+
+<p>
+The overall flow of the handling of a given CPU by an RCU-sched
+expedited grace period is shown in the following diagram:
+
+<p><img src="ExpSchedFlow.svg" alt="ExpSchedFlow.svg" width="55%">
+
+<p>
+As with RCU-preempt's <tt>synchronize_rcu_expedited()</tt>,
+<tt>synchronize_sched_expedited()</tt> ignores offline and
+idle CPUs, again because they are in remotely detectable
+quiescent states.
+However, the <tt>synchronize_rcu_expedited()</tt> handler
+is <tt>sync_sched_exp_handler()</tt>, and because the
+<tt>rcu_read_lock_sched()</tt> and <tt>rcu_read_unlock_sched()</tt>
+leave no trace of their invocation, in general it is not possible to tell
+whether or not the current CPU is in an RCU read-side critical section.
+The best that <tt>sync_sched_exp_handler()</tt> can do is to check
+for idle, on the off-chance that the CPU went idle while the IPI
+was in flight.
+If the CPU is idle, then tt>sync_sched_exp_handler()</tt> reports
+the quiescent state.
+
+<p>
+Otherwise, the handler invokes <tt>resched_cpu()</tt>, which forces
+a future context switch.
+At the time of the context switch, the CPU reports the quiescent state.
+Should the CPU go offline first, it will report the quiescent state
+at that time.
+
+<h2><a name="Expedited Grace Period and CPU Hotplug">
+Expedited Grace Period and CPU Hotplug</a></h2>
+
+<p>
+The expedited nature of expedited grace periods require a much tighter
+interaction with CPU hotplug operations than is required for normal
+grace periods.
+In addition, attempting to IPI offline CPUs will result in splats, but
+failing to IPI online CPUs can result in too-short grace periods.
+Neither option is acceptable in production kernels.
+
+<p>
+The interaction between expedited grace periods and CPU hotplug operations
+is carried out at several levels:
+
+<ol>
+<li> The number of CPUs that have ever been online is tracked
+ by the <tt>rcu_state</tt> structure's <tt>-&gt;ncpus</tt>
+ field.
+ The <tt>rcu_state</tt> structure's <tt>-&gt;ncpus_snap</tt>
+ field tracks the number of CPUs that have ever been online
+ at the beginning of an RCU expedited grace period.
+ Note that this number never decreases, at least in the absence
+ of a time machine.
+<li> The identities of the CPUs that have ever been online is
+ tracked by the <tt>rcu_node</tt> structure's
+ <tt>-&gt;expmaskinitnext</tt> field.
+ The <tt>rcu_node</tt> structure's <tt>-&gt;expmaskinit</tt>
+ field tracks the identities of the CPUs that were online
+ at least once at the beginning of the most recent RCU
+ expedited grace period.
+ The <tt>rcu_state</tt> structure's <tt>-&gt;ncpus</tt> and
+ <tt>-&gt;ncpus_snap</tt> fields are used to detect when
+ new CPUs have come online for the first time, that is,
+ when the <tt>rcu_node</tt> structure's <tt>-&gt;expmaskinitnext</tt>
+ field has changed since the beginning of the last RCU
+ expedited grace period, which triggers an update of each
+ <tt>rcu_node</tt> structure's <tt>-&gt;expmaskinit</tt>
+ field from its <tt>-&gt;expmaskinitnext</tt> field.
+<li> Each <tt>rcu_node</tt> structure's <tt>-&gt;expmaskinit</tt>
+ field is used to initialize that structure's
+ <tt>-&gt;expmask</tt> at the beginning of each RCU
+ expedited grace period.
+ This means that only those CPUs that have been online at least
+ once will be considered for a given grace period.
+<li> Any CPU that goes offline will clear its bit in its leaf
+ <tt>rcu_node</tt> structure's <tt>-&gt;qsmaskinitnext</tt>
+ field, so any CPU with that bit clear can safely be ignored.
+ However, it is possible for a CPU coming online or going offline
+ to have this bit set for some time while <tt>cpu_online</tt>
+ returns <tt>false</tt>.
+<li> For each non-idle CPU that RCU believes is currently online, the grace
+ period invokes <tt>smp_call_function_single()</tt>.
+ If this succeeds, the CPU was fully online.
+ Failure indicates that the CPU is in the process of coming online
+ or going offline, in which case it is necessary to wait for a
+ short time period and try again.
+ The purpose of this wait (or series of waits, as the case may be)
+ is to permit a concurrent CPU-hotplug operation to complete.
+<li> In the case of RCU-sched, one of the last acts of an outgoing CPU
+ is to invoke <tt>rcu_report_dead()</tt>, which
+ reports a quiescent state for that CPU.
+ However, this is likely paranoia-induced redundancy. <!-- @@@ -->
+</ol>
+
+<table>
+<tr><th>&nbsp;</th></tr>
+<tr><th align="left">Quick Quiz:</th></tr>
+<tr><td>
+ Why all the dancing around with multiple counters and masks
+ tracking CPUs that were once online?
+ Why not just have a single set of masks tracking the currently
+ online CPUs and be done with it?
+</td></tr>
+<tr><th align="left">Answer:</th></tr>
+<tr><td bgcolor="#ffffff"><font color="ffffff">
+ Maintaining single set of masks tracking the online CPUs <i>sounds</i>
+ easier, at least until you try working out all the race conditions
+ between grace-period initialization and CPU-hotplug operations.
+ For example, suppose initialization is progressing down the
+ tree while a CPU-offline operation is progressing up the tree.
+ This situation can result in bits set at the top of the tree
+ that have no counterparts at the bottom of the tree.
+ Those bits will never be cleared, which will result in
+ grace-period hangs.
+ In short, that way lies madness, to say nothing of a great many
+ bugs, hangs, and deadlocks.
+
+ <p><font color="ffffff">
+ In contrast, the current multi-mask multi-counter scheme ensures
+ that grace-period initialization will always see consistent masks
+ up and down the tree, which brings significant simplifications
+ over the single-mask method.
+
+ <p><font color="ffffff">
+ This is an instance of
+ <a href="http://www.cs.columbia.edu/~library/TR-repository/reports/reports-1992/cucs-039-92.ps.gz"><font color="ffffff">
+ deferring work in order to avoid synchronization</a>.
+ Lazily recording CPU-hotplug events at the beginning of the next
+ grace period greatly simplifies maintenance of the CPU-tracking
+ bitmasks in the <tt>rcu_node</tt> tree.
+</font></td></tr>
+<tr><td>&nbsp;</td></tr>
+</table>
+
+<h2><a name="Expedited Grace Period Refinements">
+Expedited Grace Period Refinements</a></h2>
+
+<ol>
+<li> <a href="#Idle-CPU Checks">Idle-CPU checks</a>.
+<li> <a href="#Batching via Sequence Counter">
+ Batching via sequence counter</a>.
+<li> <a href="#Funnel Locking and Wait/Wakeup">
+ Funnel locking and wait/wakeup</a>.
+<li> <a href="#Use of Workqueues">Use of Workqueues</a>.
+<li> <a href="#Stall Warnings">Stall warnings</a>.
+</ol>
+
+<h3><a name="Idle-CPU Checks">Idle-CPU Checks</a></h3>
+
+<p>
+Each expedited grace period checks for idle CPUs when initially forming
+the mask of CPUs to be IPIed and again just before IPIing a CPU
+(both checks are carried out by <tt>sync_rcu_exp_select_cpus()</tt>).
+If the CPU is idle at any time between those two times, the CPU will
+not be IPIed.
+Instead, the task pushing the grace period forward will include the
+idle CPUs in the mask passed to <tt>rcu_report_exp_cpu_mult()</tt>.
+
+<p>
+For RCU-sched, there is an additional check for idle in the IPI
+handler, <tt>sync_sched_exp_handler()</tt>.
+If the IPI has interrupted the idle loop, then
+<tt>sync_sched_exp_handler()</tt> invokes <tt>rcu_report_exp_rdp()</tt>
+to report the corresponding quiescent state.
+
+<p>
+For RCU-preempt, there is no specific check for idle in the
+IPI handler (<tt>sync_rcu_exp_handler()</tt>), but because
+RCU read-side critical sections are not permitted within the
+idle loop, if <tt>sync_rcu_exp_handler()</tt> sees that the CPU is within
+RCU read-side critical section, the CPU cannot possibly be idle.
+Otherwise, <tt>sync_rcu_exp_handler()</tt> invokes
+<tt>rcu_report_exp_rdp()</tt> to report the corresponding quiescent
+state, regardless of whether or not that quiescent state was due to
+the CPU being idle.
+
+<p>
+In summary, RCU expedited grace periods check for idle when building
+the bitmask of CPUs that must be IPIed, just before sending each IPI,
+and (either explicitly or implicitly) within the IPI handler.
+
+<h3><a name="Batching via Sequence Counter">
+Batching via Sequence Counter</a></h3>
+
+<p>
+If each grace-period request was carried out separately, expedited
+grace periods would have abysmal scalability and
+problematic high-load characteristics.
+Because each grace-period operation can serve an unlimited number of
+updates, it is important to <i>batch</i> requests, so that a single
+expedited grace-period operation will cover all requests in the
+corresponding batch.
+
+<p>
+This batching is controlled by a sequence counter named
+<tt>-&gt;expedited_sequence</tt> in the <tt>rcu_state</tt> structure.
+This counter has an odd value when there is an expedited grace period
+in progress and an even value otherwise, so that dividing the counter
+value by two gives the number of completed grace periods.
+During any given update request, the counter must transition from
+even to odd and then back to even, thus indicating that a grace
+period has elapsed.
+Therefore, if the initial value of the counter is <tt>s</tt>,
+the updater must wait until the counter reaches at least the
+value <tt>(s+3)&amp;~0x1</tt>.
+This counter is managed by the following access functions:
+
+<ol>
+<li> <tt>rcu_exp_gp_seq_start()</tt>, which marks the start of
+ an expedited grace period.
+<li> <tt>rcu_exp_gp_seq_end()</tt>, which marks the end of an
+ expedited grace period.
+<li> <tt>rcu_exp_gp_seq_snap()</tt>, which obtains a snapshot of
+ the counter.
+<li> <tt>rcu_exp_gp_seq_done()</tt>, which returns <tt>true</tt>
+ if a full expedited grace period has elapsed since the
+ corresponding call to <tt>rcu_exp_gp_seq_snap()</tt>.
+</ol>
+
+<p>
+Again, only one request in a given batch need actually carry out
+a grace-period operation, which means there must be an efficient
+way to identify which of many concurrent reqeusts will initiate
+the grace period, and that there be an efficient way for the
+remaining requests to wait for that grace period to complete.
+However, that is the topic of the next section.
+
+<h3><a name="Funnel Locking and Wait/Wakeup">
+Funnel Locking and Wait/Wakeup</a></h3>
+
+<p>
+The natural way to sort out which of a batch of updaters will initiate
+the expedited grace period is to use the <tt>rcu_node</tt> combining
+tree, as implemented by the <tt>exp_funnel_lock()</tt> function.
+The first updater corresponding to a given grace period arriving
+at a given <tt>rcu_node</tt> structure records its desired grace-period
+sequence number in the <tt>-&gt;exp_seq_rq</tt> field and moves up
+to the next level in the tree.
+Otherwise, if the <tt>-&gt;exp_seq_rq</tt> field already contains
+the sequence number for the desired grace period or some later one,
+the updater blocks on one of four wait queues in the
+<tt>-&gt;exp_wq[]</tt> array, using the second-from-bottom
+and third-from bottom bits as an index.
+An <tt>-&gt;exp_lock</tt> field in the <tt>rcu_node</tt> structure
+synchronizes access to these fields.
+
+<p>
+An empty <tt>rcu_node</tt> tree is shown in the following diagram,
+with the white cells representing the <tt>-&gt;exp_seq_rq</tt> field
+and the red cells representing the elements of the
+<tt>-&gt;exp_wq[]</tt> array.
+
+<p><img src="Funnel0.svg" alt="Funnel0.svg" width="75%">
+
+<p>
+The next diagram shows the situation after the arrival of Task&nbsp;A
+and Task&nbsp;B at the leftmost and rightmost leaf <tt>rcu_node</tt>
+structures, respectively.
+The current value of the <tt>rcu_state</tt> structure's
+<tt>-&gt;expedited_sequence</tt> field is zero, so adding three and
+clearing the bottom bit results in the value two, which both tasks
+record in the <tt>-&gt;exp_seq_rq</tt> field of their respective
+<tt>rcu_node</tt> structures:
+
+<p><img src="Funnel1.svg" alt="Funnel1.svg" width="75%">
+
+<p>
+Each of Tasks&nbsp;A and&nbsp;B will move up to the root
+<tt>rcu_node</tt> structure.
+Suppose that Task&nbsp;A wins, recording its desired grace-period sequence
+number and resulting in the state shown below:
+
+<p><img src="Funnel2.svg" alt="Funnel2.svg" width="75%">
+
+<p>
+Task&nbsp;A now advances to initiate a new grace period, while Task&nbsp;B
+moves up to the root <tt>rcu_node</tt> structure, and, seeing that
+its desired sequence number is already recorded, blocks on
+<tt>-&gt;exp_wq[1]</tt>.
+
+<table>
+<tr><th>&nbsp;</th></tr>
+<tr><th align="left">Quick Quiz:</th></tr>
+<tr><td>
+ Why <tt>-&gt;exp_wq[1]</tt>?
+ Given that the value of these tasks' desired sequence number is
+ two, so shouldn't they instead block on <tt>-&gt;exp_wq[2]</tt>?
+</td></tr>
+<tr><th align="left">Answer:</th></tr>
+<tr><td bgcolor="#ffffff"><font color="ffffff">
+ No.
+
+ <p><font color="ffffff">
+ Recall that the bottom bit of the desired sequence number indicates
+ whether or not a grace period is currently in progress.
+ It is therefore necessary to shift the sequence number right one
+ bit position to obtain the number of the grace period.
+ This results in <tt>-&gt;exp_wq[1]</tt>.
+</font></td></tr>
+<tr><td>&nbsp;</td></tr>
+</table>
+
+<p>
+If Tasks&nbsp;C and&nbsp;D also arrive at this point, they will compute the
+same desired grace-period sequence number, and see that both leaf
+<tt>rcu_node</tt> structures already have that value recorded.
+They will therefore block on their respective <tt>rcu_node</tt>
+structures' <tt>-&gt;exp_wq[1]</tt> fields, as shown below:
+
+<p><img src="Funnel3.svg" alt="Funnel3.svg" width="75%">
+
+<p>
+Task&nbsp;A now acquires the <tt>rcu_state</tt> structure's
+<tt>-&gt;exp_mutex</tt> and initiates the grace period, which
+increments <tt>-&gt;expedited_sequence</tt>.
+Therefore, if Tasks&nbsp;E and&nbsp;F arrive, they will compute
+a desired sequence number of 4 and will record this value as
+shown below:
+
+<p><img src="Funnel4.svg" alt="Funnel4.svg" width="75%">
+
+<p>
+Tasks&nbsp;E and&nbsp;F will propagate up the <tt>rcu_node</tt>
+combining tree, with Task&nbsp;F blocking on the root <tt>rcu_node</tt>
+structure and Task&nbsp;E wait for Task&nbsp;A to finish so that
+it can start the next grace period.
+The resulting state is as shown below:
+
+<p><img src="Funnel5.svg" alt="Funnel5.svg" width="75%">
+
+<p>
+Once the grace period completes, Task&nbsp;A
+starts waking up the tasks waiting for this grace period to complete,
+increments the <tt>-&gt;expedited_sequence</tt>,
+acquires the <tt>-&gt;exp_wake_mutex</tt> and then releases the
+<tt>-&gt;exp_mutex</tt>.
+This results in the following state:
+
+<p><img src="Funnel6.svg" alt="Funnel6.svg" width="75%">
+
+<p>
+Task&nbsp;E can then acquire <tt>-&gt;exp_mutex</tt> and increment
+<tt>-&gt;expedited_sequence</tt> to the value three.
+If new tasks&nbsp;G and&nbsp;H arrive and moves up the combining tree at the
+same time, the state will be as follows:
+
+<p><img src="Funnel7.svg" alt="Funnel7.svg" width="75%">
+
+<p>
+Note that three of the root <tt>rcu_node</tt> structure's
+waitqueues are now occupied.
+However, at some point, Task&nbsp;A will wake up the
+tasks blocked on the <tt>-&gt;exp_wq</tt> waitqueues, resulting
+in the following state:
+
+<p><img src="Funnel8.svg" alt="Funnel8.svg" width="75%">
+
+<p>
+Execution will continue with Tasks&nbsp;E and&nbsp;H completing
+their grace periods and carrying out their wakeups.
+
+<table>
+<tr><th>&nbsp;</th></tr>
+<tr><th align="left">Quick Quiz:</th></tr>
+<tr><td>
+ What happens if Task&nbsp;A takes so long to do its wakeups
+ that Task&nbsp;E's grace period completes?
+</td></tr>
+<tr><th align="left">Answer:</th></tr>
+<tr><td bgcolor="#ffffff"><font color="ffffff">
+ Then Task&nbsp;E will block on the <tt>-&gt;exp_wake_mutex</tt>,
+ which will also prevent it from releasing <tt>-&gt;exp_mutex</tt>,
+ which in turn will prevent the next grace period from starting.
+ This last is important in preventing overflow of the
+ <tt>-&gt;exp_wq[]</tt> array.
+</font></td></tr>
+<tr><td>&nbsp;</td></tr>
+</table>
+
+<h3><a name="Use of Workqueues">Use of Workqueues</a></h3>
+
+<p>
+In earlier implementations, the task requesting the expedited
+grace period also drove it to completion.
+This straightforward approach had the disadvantage of needing to
+account for signals sent to user tasks,
+so more recent implemementations use the Linux kernel's
+<a href="https://www.kernel.org/doc/Documentation/workqueue.txt">workqueues</a>.
+
+<p>
+The requesting task still does counter snapshotting and funnel-lock
+processing, but the task reaching the top of the funnel lock
+does a <tt>schedule_work()</tt> (from <tt>_synchronize_rcu_expedited()</tt>
+so that a workqueue kthread does the actual grace-period processing.
+Because workqueue kthreads do not accept signals, grace-period-wait
+processing need not allow for signals.
+
+In addition, this approach allows wakeups for the previous expedited
+grace period to be overlapped with processing for the next expedited
+grace period.
+Because there are only four sets of waitqueues, it is necessary to
+ensure that the previous grace period's wakeups complete before the
+next grace period's wakeups start.
+This is handled by having the <tt>-&gt;exp_mutex</tt>
+guard expedited grace-period processing and the
+<tt>-&gt;exp_wake_mutex</tt> guard wakeups.
+The key point is that the <tt>-&gt;exp_mutex</tt> is not released
+until the first wakeup is complete, which means that the
+<tt>-&gt;exp_wake_mutex</tt> has already been acquired at that point.
+This approach ensures that the previous grace period's wakeups can
+be carried out while the current grace period is in process, but
+that these wakeups will complete before the next grace period starts.
+This means that only three waitqueues are required, guaranteeing that
+the four that are provided are sufficient.
+
+<h3><a name="Stall Warnings">Stall Warnings</a></h3>
+
+<p>
+Expediting grace periods does nothing to speed things up when RCU
+readers take too long, and therefore expedited grace periods check
+for stalls just as normal grace periods do.
+
+<table>
+<tr><th>&nbsp;</th></tr>
+<tr><th align="left">Quick Quiz:</th></tr>
+<tr><td>
+ But why not just let the normal grace-period machinery
+ detect the stalls, given that a given reader must block
+ both normal and expedited grace periods?
+</td></tr>
+<tr><th align="left">Answer:</th></tr>
+<tr><td bgcolor="#ffffff"><font color="ffffff">
+ Because it is quite possible that at a given time there
+ is no normal grace period in progress, in which case the
+ normal grace period cannot emit a stall warning.
+</font></td></tr>
+<tr><td>&nbsp;</td></tr>
+</table>
+
+The <tt>synchronize_sched_expedited_wait()</tt> function loops waiting
+for the expedited grace period to end, but with a timeout set to the
+current RCU CPU stall-warning time.
+If this time is exceeded, any CPUs or <tt>rcu_node</tt> structures
+blocking the current grace period are printed.
+Each stall warning results in another pass through the loop, but the
+second and subsequent passes use longer stall times.
+
+<h3><a name="Summary">
+Summary</a></h3>
+
+<p>
+Expedited grace periods use a sequence-number approach to promote
+batching, so that a single grace-period operation can serve numerous
+requests.
+A funnel lock is used to efficiently identify the one task out of
+a concurrent group that will request the grace period.
+All members of the group will block on waitqueues provided in
+the <tt>rcu_node</tt> structure.
+The actual grace-period processing is carried out by a workqueue.
+
+<p>
+CPU-hotplug operations are noted lazily in order to prevent the need
+for tight synchronization between expedited grace periods and
+CPU-hotplug operations.
+The dyntick-idle counters are used to avoid sending IPIs to idle CPUs,
+at least in the common case.
+RCU-preempt and RCU-sched use different IPI handlers and different
+code to respond to the state changes carried out by those handlers,
+but otherwise use common code.
+
+<p>
+Quiescent states are tracked using the <tt>rcu_node</tt> tree,
+and once all necessary quiescent states have been reported,
+all tasks waiting on this expedited grace period are awakened.
+A pair of mutexes are used to allow one grace period's wakeups
+to proceed concurrently with the next grace period's processing.
+
+<p>
+This combination of mechanisms allows expedited grace periods to
+run reasonably efficiently.
+However, for non-time-critical tasks, normal grace periods should be
+used instead because their longer duration permits much higher
+degrees of batching, and thus much lower per-request overheads.
+
+</body></html>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg
new file mode 100644
index 000000000000..98af66557908
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg
@@ -0,0 +1,275 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel0.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="201.06495"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="171"
+ inkscape:window-y="279"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.45404"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="145.45404"
+ y="360.25174"
+ style="font-size:10px">:0</tspan></text>
+ </g>
+ <g
+ id="g3997-7"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.45404"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.45404"
+ y="360.25174"
+ style="font-size:10px">:0</tspan></text>
+ </g>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg
new file mode 100644
index 000000000000..e0184a37aec7
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg
@@ -0,0 +1,275 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel1.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="201.06495"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="g3997-7"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="363"
+ inkscape:window-y="336"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">A:2</tspan></text>
+ </g>
+ <g
+ id="g3997-7"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">B:2</tspan></text>
+ </g>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg
new file mode 100644
index 000000000000..1bc3fed54d58
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg
@@ -0,0 +1,287 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel2.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="g3997-7"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="363"
+ inkscape:window-y="336"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 0</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:2</tspan></text>
+ </g>
+ <g
+ id="g3997-7"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">B:2</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">A:2</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg
new file mode 100644
index 000000000000..6d8a1bffb3e4
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg
@@ -0,0 +1,323 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel3.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 0 GP: A</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:2</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.51051"
+ y="360.18094"
+ id="text3013-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6"
+ x="232.51051"
+ y="360.18094"
+ style="font-size:10px">C</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">:2</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.31764"
+ y="360.18582"
+ id="text3013-3-3-7"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6-5"
+ x="232.31764"
+ y="360.18582"
+ style="font-size:10px">D</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:2</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="361.97092"
+ y="291.88705"
+ id="text3013-3-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7"
+ x="361.97092"
+ y="291.88705"
+ style="font-size:10px">B</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg
new file mode 100644
index 000000000000..44018fd6342b
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg
@@ -0,0 +1,323 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel4.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 1 GP: A</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">E:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.51051"
+ y="360.18094"
+ id="text3013-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6"
+ x="232.51051"
+ y="360.18094"
+ style="font-size:10px">C</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">F:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.31764"
+ y="360.18582"
+ id="text3013-3-3-7"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6-5"
+ x="232.31764"
+ y="360.18582"
+ style="font-size:10px">D</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:2</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="361.97092"
+ y="291.88705"
+ id="text3013-3-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7"
+ x="361.97092"
+ y="291.88705"
+ style="font-size:10px">B</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg
new file mode 100644
index 000000000000..e5eef50454fb
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg
@@ -0,0 +1,335 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel5.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 1 GP: A,E</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.51051"
+ y="360.18094"
+ id="text3013-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6"
+ x="232.51051"
+ y="360.18094"
+ style="font-size:10px">C</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.31764"
+ y="360.18582"
+ id="text3013-3-3-7"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6-5"
+ x="232.31764"
+ y="360.18582"
+ style="font-size:10px">D</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="361.97092"
+ y="291.88705"
+ id="text3013-3-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7"
+ x="361.97092"
+ y="291.88705"
+ style="font-size:10px">B</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="405.40396"
+ y="291.88705"
+ id="text3013-3-36-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6"
+ x="405.40396"
+ y="291.88705"
+ style="font-size:10px">F</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg
new file mode 100644
index 000000000000..fbd2c1892886
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg
@@ -0,0 +1,335 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel6.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 2 GP: E Wakeup: A</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.51051"
+ y="360.18094"
+ id="text3013-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6"
+ x="232.51051"
+ y="360.18094"
+ style="font-size:10px">C</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.31764"
+ y="360.18582"
+ id="text3013-3-3-7"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6-5"
+ x="232.31764"
+ y="360.18582"
+ style="font-size:10px">D</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="361.97092"
+ y="291.88705"
+ id="text3013-3-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7"
+ x="361.97092"
+ y="291.88705"
+ style="font-size:10px">B</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="405.40396"
+ y="291.88705"
+ id="text3013-3-36-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6"
+ x="405.40396"
+ y="291.88705"
+ style="font-size:10px">F</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg
new file mode 100644
index 000000000000..502e159ed278
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg
@@ -0,0 +1,347 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel7.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 3 GP: E,H Wakeup: A</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.51051"
+ y="360.18094"
+ id="text3013-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6"
+ x="232.51051"
+ y="360.18094"
+ style="font-size:10px">C</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">:6</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="232.31764"
+ y="360.18582"
+ id="text3013-3-3-7"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-6-5"
+ x="232.31764"
+ y="360.18582"
+ style="font-size:10px">D</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:6</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="361.97092"
+ y="291.88705"
+ id="text3013-3-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7"
+ x="361.97092"
+ y="291.88705"
+ style="font-size:10px">B</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="405.40396"
+ y="291.88705"
+ id="text3013-3-36-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6"
+ x="405.40396"
+ y="291.88705"
+ style="font-size:10px">F</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="449.22031"
+ y="291.88217"
+ id="text3013-3-36-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6-6"
+ x="449.22031"
+ y="291.88217"
+ style="font-size:10px">G</tspan></text>
+ </g>
+</svg>
diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg
new file mode 100644
index 000000000000..677401551c7d
--- /dev/null
+++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg
@@ -0,0 +1,311 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ width="490.05093"
+ height="125.78741"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.48.4 r9939"
+ sodipodi:docname="Funnel8.svg">
+ <defs
+ id="defs4">
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend"
+ style="overflow:visible">
+ <path
+ id="path3792"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart"
+ style="overflow:visible">
+ <path
+ id="path3789"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lstart"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lstart-4"
+ style="overflow:visible">
+ <path
+ id="path3789-9"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(1.1,0,0,1.1,1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ <marker
+ inkscape:stockid="Arrow2Lend"
+ orient="auto"
+ refY="0"
+ refX="0"
+ id="Arrow2Lend-4"
+ style="overflow:visible">
+ <path
+ id="path3792-4"
+ style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+ d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+ transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+ inkscape:connector-curvature="0" />
+ </marker>
+ </defs>
+ <sodipodi:namedview
+ id="base"
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1.0"
+ inkscape:pageopacity="0.0"
+ inkscape:pageshadow="2"
+ inkscape:zoom="1.3670394"
+ inkscape:cx="114.01552"
+ inkscape:cy="-86.548414"
+ inkscape:document-units="px"
+ inkscape:current-layer="layer1"
+ showgrid="false"
+ inkscape:window-width="1351"
+ inkscape:window-height="836"
+ inkscape:window-x="68"
+ inkscape:window-y="180"
+ inkscape:window-maximized="0"
+ fit-margin-top="5"
+ fit-margin-left="5"
+ fit-margin-right="5"
+ fit-margin-bottom="5" />
+ <metadata
+ id="metadata7">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <g
+ inkscape:label="Layer 1"
+ inkscape:groupmode="layer"
+ id="layer1"
+ transform="translate(-117.08462,-249.92053)">
+ <flowRoot
+ xml:space="preserve"
+ id="flowRoot2985"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
+ id="flowRegion2987"><rect
+ id="rect2989"
+ width="82.85714"
+ height="11.428572"
+ x="240"
+ y="492.36218" /></flowRegion><flowPara
+ id="flowPara2991" /></flowRoot> <text
+ xml:space="preserve"
+ style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
+ x="362.371"
+ y="262.51819"
+ id="text4441"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4443"
+ x="362.371"
+ y="262.51819">-&gt;expedited_sequence: 3 GP: E,H</tspan></text>
+ <rect
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101"
+ width="43.158947"
+ height="26.33428"
+ x="253.55223"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3"
+ width="43.158947"
+ height="26.33428"
+ x="297.04141"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+ id="rect3101-3-6"
+ width="43.158947"
+ height="26.33428"
+ x="427.509"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7"
+ width="43.158947"
+ height="26.33428"
+ x="384.01981"
+ y="275.07489" />
+ <rect
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1"
+ id="rect3101-3-6-7-5"
+ width="43.158947"
+ height="26.33428"
+ x="340.53061"
+ y="275.07489" />
+ <g
+ id="g3997"
+ transform="translate(-0.87295532,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2"
+ style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="146.00092"
+ y="360.25174"
+ id="text3013"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015"
+ x="146.00092"
+ y="360.25174"
+ style="font-size:10px">:4</tspan></text>
+ </g>
+ <g
+ id="g3019"
+ transform="translate(260.06223,0)">
+ <rect
+ y="343.37366"
+ x="123.95757"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-35-0"
+ style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="167.44673"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-62-9"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="297.91437"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-9-3"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="254.42516"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-1-6"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <rect
+ y="343.37366"
+ x="210.93593"
+ height="26.33428"
+ width="43.158947"
+ id="rect3101-3-6-7-5-2-0"
+ style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="145.54926"
+ y="360.25174"
+ id="text3013-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6"
+ x="145.54926"
+ y="360.25174"
+ style="font-size:10px">:6</tspan></text>
+ </g>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="275.59558"
+ y="291.95297"
+ id="text3013-36"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-7"
+ x="275.59558"
+ y="291.95297"
+ style="font-size:10px">:6</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="405.40396"
+ y="291.88705"
+ id="text3013-3-36-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6"
+ x="405.40396"
+ y="291.88705"
+ style="font-size:10px">F</tspan></text>
+ <text
+ xml:space="preserve"
+ style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+ x="449.22031"
+ y="291.88217"
+ id="text3013-3-36-3-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan3015-6-7-6-6"
+ x="449.22031"
+ y="291.88217"
+ style="font-size:10px">G</tspan></text>
+ </g>
+</svg>