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* HWPOISON: add memory cgroup filterAndi Kleen2009-12-161-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hwpoison test suite need to inject hwpoison to a collection of selected task pages, and must not touch pages not owned by them and thus kill important system processes such as init. (But it's OK to mis-hwpoison free/unowned pages as well as shared clean pages. Mis-hwpoison of shared dirty pages will kill all tasks, so the test suite will target all or non of such tasks in the first place.) The memory cgroup serves this purpose well. We can put the target processes under the control of a memory cgroup, and tell the hwpoison injection code to only kill pages associated with some active memory cgroup. The prerequisite for doing hwpoison stress tests with mem_cgroup is, the mem_cgroup code tracks task pages _accurately_ (unless page is locked). Which we believe is/should be true. The benefits are simplification of hwpoison injector code. Also the mem_cgroup code will automatically be tested by hwpoison test cases. The alternative interfaces pin-pfn/unpin-pfn can also delegate the (process and page flags) filtering functions reliably to user space. However prototype implementation shows that this scheme adds more complexity than we wanted. Example test case: mkdir /cgroup/hwpoison usemem -m 100 -s 1000 & echo `jobs -p` > /cgroup/hwpoison/tasks memcg_ino=$(ls -id /cgroup/hwpoison | cut -f1 -d' ') echo $memcg_ino > /debug/hwpoison/corrupt-filter-memcg page-types -p `pidof init` --hwpoison # shall do nothing page-types -p `pidof usemem` --hwpoison # poison its pages [AK: Fix documentation] [Add fix for problem noticed by Li Zefan <lizf@cn.fujitsu.com>; dentry in the css could be NULL] CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> CC: Hugh Dickins <hugh.dickins@tiscali.co.uk> CC: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> CC: Balbir Singh <balbir@linux.vnet.ibm.com> CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> CC: Li Zefan <lizf@cn.fujitsu.com> CC: Paul Menage <menage@google.com> CC: Nick Piggin <npiggin@suse.de> CC: Andi Kleen <andi@firstfloor.org> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* HWPOISON: add page flags filterWu Fengguang2009-12-161-0/+10
| | | | | | | | | | | | | | | | | | | | | When specified, only poison pages if ((page_flags & mask) == value). - corrupt-filter-flags-mask - corrupt-filter-flags-value This allows stress testing of many kinds of pages. Strictly speaking, the buddy pages requires taking zone lock, to avoid setting PG_hwpoison on a "was buddy but now allocated to someone" page. However we can just do nothing because we set PG_locked in the beginning, this prevents the page allocator from allocating it to someone. (It will BUG() on the unexpected PG_locked, which is fine for hwpoison testing.) [AK: Add select PROC_PAGE_MONITOR to satisfy dependency] CC: Nick Piggin <npiggin@suse.de> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* HWPOISON: limit hwpoison injector to known page typesWu Fengguang2009-12-161-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | __memory_failure()'s workflow is set PG_hwpoison //... unset PG_hwpoison if didn't pass hwpoison filter That could kill unrelated process if it happens to page fault on the page with the (temporary) PG_hwpoison. The race should be big enough to appear in stress tests. Fix it by grabbing the page and checking filter at inject time. This also avoids the very noisy "Injecting memory failure..." messages. - we don't touch madvise() based injection, because the filters are generally not necessary for it. - if we want to apply the filters to h/w aided injection, we'd better to rearrange the logic in __memory_failure() instead of this patch. AK: fix documentation, use drain all, cleanups CC: Haicheng Li <haicheng.li@intel.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* HWPOISON: add fs/device filtersWu Fengguang2009-12-161-0/+7
| | | | | | | | | | | | | | | | | | | | | | | Filesystem data/metadata present the most tricky-to-isolate pages. It requires careful code review and stress testing to get them right. The fs/device filter helps to target the stress tests to some specific filesystem pages. The filter condition is block device's major/minor numbers: - corrupt-filter-dev-major - corrupt-filter-dev-minor When specified (non -1), only page cache pages that belong to that device will be poisoned. The filters are checked reliably on the locked and refcounted page. Haicheng: clear PG_hwpoison and drop bad page count if filter not OK AK: Add documentation CC: Haicheng Li <haicheng.li@intel.com> CC: Nick Piggin <npiggin@suse.de> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* HWPOISON: Add unpoisoning supportWu Fengguang2009-12-161-2/+14
| | | | | | | | | | | | | | | | | | The unpoisoning interface is useful for stress testing tools to reclaim poisoned pages (to prevent OOM) There is no hardware level unpoisioning, so this cannot be used for real memory errors, only for software injected errors. Note that it may leak pages silently - those who have been removed from LRU cache, but not isolated from page cache/swap cache at hwpoison time. Especially the stress test of dirty swap cache pages shall reboot system before exhausting memory. AK: Fix comments, add documentation, add printks, rename symbol Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* page-types: add standard GPL license headerWu Fengguang2009-12-161-2/+13
| | | | | Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dmLinus Torvalds2009-12-151-5/+55
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (80 commits) dm snapshot: use merge origin if snapshot invalid dm snapshot: report merge failure in status dm snapshot: merge consecutive chunks together dm snapshot: trigger exceptions in remaining snapshots during merge dm snapshot: delay merging a chunk until writes to it complete dm snapshot: queue writes to chunks being merged dm snapshot: add merging dm snapshot: permit only one merge at once dm snapshot: support barriers in snapshot merge target dm snapshot: avoid allocating exceptions in merge dm snapshot: rework writing to origin dm snapshot: add merge target dm exception store: add merge specific methods dm snapshot: create function for chunk_is_tracked wait dm snapshot: make bio optional in __origin_write dm mpath: reject messages when device is suspended dm: export suspended state to targets dm: rename dm_suspended to dm_suspended_md dm: swap target postsuspend call and setting suspended flag dm crypt: add plain64 iv ...
| * dm snapshot: add merge targetMikulas Patocka2009-12-111-5/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The snapshot-merge target allows a snapshot to be merged back into the snapshot's origin device. One anticipated use of snapshot merging is the rollback of filesystems to back out problematic system upgrades. This patch adds snapshot-merge target management to both dm_snapshot_init() and dm_snapshot_exit(). As an initial place-holder, snapshot-merge is identical to the snapshot target. Documentation is provided. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
* | lis3: update documentation to match latest changesSamu Onkalo2009-12-151-7/+24
| | | | | | | | | | | | | | | | | | | | [akpm@linux-foundation.org: s/q/g/ (Randy)] Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Éric Piel <Eric.Piel@tremplin-utc.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lis3: update documentation and commentsÉric Piel2009-12-151-10/+14
| | | | | | | | | | | | | | | | | | | | | | | | Most of the documentation and comments were written when the driver was only supporting one type of chip, only via ACPI/HP. Update the info to the much clearer understanding that we have now. Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hwmon: w83627ehf updatesDaniel J Blueman2009-12-151-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add control of fan minimum turn-on output levels, decoupling it from the fan turn-off output level. Add control of rate of change of fan output level. These in turn allow lower turn-off rotor speed and smoother transitions for better thermal and acoustic control authority. Add support for constant fan speed and proportional-response operations modes. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: David Hubbard <david.c.hubbard@gmail.com> Cc: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kallsyms: remove deprecated print_fn_descriptor_symbol()Amerigo Wang2009-12-151-9/+0
| | | | | | | | | | | | | | | | | | | | | | | | According to feature-removal-schedule.txt, it is the time to remove print_fn_descriptor_symbol(). And a quick grep shows that it no longer has any callers. Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ad525x_dpot: new driver for AD525x digital potentiometersMichael Hennerich2009-12-151-0/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver supports the non-volatile digital potentiometers via I2C: AD5258, AD5259, AD5251, AD5252, AD5253, AD5254, and AD5255 It provides a sysfs interface to each device for reading/writing which is documented in Documentation/misc-devices/ad525x_dpot.txt. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Chris Verges <chrisv@cyberswitching.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | procfs: allow threads to rename siblings via /proc/pid/tasks/tid/commjohn stultz2009-12-151-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setting a thread's comm to be something unique is a very useful ability and is helpful for debugging complicated threaded applications. However currently the only way to set a thread name is for the thread to name itself via the PR_SET_NAME prctl. However, there may be situations where it would be advantageous for a thread dispatcher to be naming the threads its managing, rather then having the threads self-describe themselves. This sort of behavior is available on other systems via the pthread_setname_np() interface. This patch exports a task's comm via proc/pid/comm and proc/pid/task/tid/comm interfaces, and allows thread siblings to write to these values. [akpm@linux-foundation.org: cleanups] Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Mike Fulton <fultonm@ca.ibm.com> Cc: Sean Foley <Sean_Foley@ca.ibm.com> Cc: Darren Hart <dvhltc@us.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | nommu: fix malloc performance by adding uninitialized flagJie Zhang2009-12-151-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NOMMU code currently clears all anonymous mmapped memory. While this is what we want in the default case, all memory allocation from userspace under NOMMU has to go through this interface, including malloc() which is allowed to return uninitialized memory. This can easily be a significant performance penalty. So for constrained embedded systems were security is irrelevant, allow people to avoid clearing memory unnecessarily. This also alters the ELF-FDPIC binfmt such that it obtains uninitialised memory for the brk and stack region. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ksm: remove unswappable max_kernel_pagesHugh Dickins2009-12-151-15/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that ksm pages are swappable, and the known holes plugged, remove mention of unswappable kernel pages from KSM documentation and comments. Remove the totalram_pages/4 initialization of max_kernel_pages. In fact, remove max_kernel_pages altogether - we can reinstate it if removal turns out to break someone's script; but if we later want to limit KSM's memory usage, limiting the stable nodes would not be an effective approach. Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Izik Eidus <ieidus@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Chris Wright <chrisw@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Documentation: ABI: /sys/devices/system/cpu/cpu#/nodeAlex Chiang2009-12-151-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Describe NUMA node symlink created for CPUs when CONFIG_NUMA is set. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | mm: add numa node symlink for memory section in sysfsAlex Chiang2009-12-152-5/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit c04fc586c (mm: show node to memory section relationship with symlinks in sysfs) created symlinks from nodes to memory sections, e.g. /sys/devices/system/node/node1/memory135 -> ../../memory/memory135 If you're examining the memory section though and are wondering what node it might belong to, you can find it by grovelling around in sysfs, but it's a little cumbersome. Add a reverse symlink for each memory section that points back to the node to which it belongs. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hugetlb: handle memory hot-plug eventsLee Schermerhorn2009-12-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Register per node hstate attributes only for nodes with memory. As suggested by David Rientjes. With Memory Hotplug, memory can be added to a memoryless node and a node with memory can become memoryless. Therefore, add a memory on/off-line notifier callback to [un]register a node's attributes on transition to/from memoryless state. N.B., Only tested build, boot, libhugetlbfs regression. i.e., no memory hotplug testing. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Reviewed-by: Andi Kleen <andi@firstfloor.org> Acked-by: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hugetlb: use only nodes with memory for huge pagesLee Schermerhorn2009-12-151-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Register per node hstate sysfs attributes only for nodes with memory. Global replacement of 'all online nodes" with "all nodes with memory" in mm/hugetlb.c. Suggested by David Rientjes. A subsequent patch will handle adding/removing of per node hstate sysfs attributes when nodes transition to/from memoryless state via memory hotplug. NOTE: this patch has not been tested with memoryless nodes. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Reviewed-by: Andi Kleen <andi@firstfloor.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | hugetlb: update hugetlb documentation for NUMA controlsLee Schermerhorn2009-12-151-85/+176
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the kernel huge tlb documentation to describe the numa memory policy based huge page management. Additionaly, the patch includes a fair amount of rework to improve consistency, eliminate duplication and set the context for documenting the memory policy interaction. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Andi Kleen <andi@firstfloor.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | page-types: exit early when invoked with -d|--describeAlex Chiang2009-12-151-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a system with large amount of memory (256GB), invoking page-types can take quite a long time, which is unreasonable considering the user only wants a description of the flags: # time ./page-types -d 0x10 0x0000000000000010 ____D_____________________________ dirty real 0m34.285s user 0m1.966s sys 0m32.313s This is because we still walk the entire address range. Exiting early seems like a reasonble solution: # time ./page-types -d 0x10 0x0000000000000010 ____D_____________________________ dirty real 0m0.007s user 0m0.001s sys 0m0.005s Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Haicheng Li <haicheng.li@intel.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | page-types: whitespace alignmentAlex Chiang2009-12-151-23/+23
| | | | | | | | | | | | | | | | | | Align the output when page-type -h is invoked. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | page-types: learn to describe flags directly from command lineAlex Chiang2009-12-151-1/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Teach page-types to describe page flags directly from the command line. Why is this useful? For instance, if you're using memory hotplug and see this in /var/log/messages: kernel: removing from LRU failed 3836dd0/1/1e00000000000010 It would be nice to decode those page flags without staring at the source. Example usage and output: # Documentation/vm/page-types -d 0x10 0x0000000000000010 ____D_____________________________ dirty # Documentation/vm/page-types -d anon 0x0000000000001000 ____________a_____________________ anonymous # Documentation/vm/page-types -d anon,0x10 0x0000000000001010 ____D_______a_____________________ dirty,anonymous [achiang@hp.com: documentation] Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Haicheng Li <haicheng.li@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | page-types: unsigned cannot be less than 0 in add_page()Roel Kluin2009-12-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | If not signed, testing of the read() return value in this function will not work. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | page-types: constify read only arraysTommi Rantala2009-12-151-3/+3
| | | | | | | | | | | | | | | | Signed-off-by: Tommi Rantala <tt.rantala@gmail.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'i2c-for-linus' of ↵Linus Torvalds2009-12-141-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c-core: i2c bus should support PM entries in struct dev_pm_ops i2c: Get rid of I2C_CLIENT_MODULE_PARM i2c: Drop I2C_CLIENT_INSMOD_2 to 8 i2c: Drop I2C_CLIENT_INSMOD_1 i2c: Get rid of struct i2c_client_address_data i2c: Drop the kind parameter from detect callbacks
| * | i2c: Get rid of struct i2c_client_address_dataJean Delvare2009-12-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Struct i2c_client_address_data only contains one field at this point, which makes its usefulness questionable. Get rid of it and pass simple address lists around instead. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
* | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-12-142-7/+31
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mce: Clean up thermal init by introducing intel_thermal_supported() x86, mce: Thermal monitoring depends on APIC being enabled x86: Gart: fix breakage due to IOMMU initialization cleanup x86: Move swiotlb initialization before dma32_free_bootmem x86: Fix build warning in arch/x86/mm/mmio-mod.c x86: Remove usedac in feature-removal-schedule.txt x86: Fix duplicated UV BAU interrupt vector nvram: Fix write beyond end condition; prove to gcc copy is safe mm: Adjust do_pages_stat() so gcc can see copy_from_user() is safe x86: Limit the number of processor bootup messages x86: Remove enabling x2apic message for every CPU doc: Add documentation for bootloader_{type,version} x86, msr: Add support for non-contiguous cpumasks x86: Use find_e820() instead of hard coded trampoline address x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasks Trivial percpu-naming-introduced conflicts in arch/x86/kernel/cpu/intel_cacheinfo.c
| * | | x86: Remove usedac in feature-removal-schedule.txtFUJITA Tomonori2009-12-141-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The reason of removal, "replaced by allowdac and no dac combination" is incorrect. There is no way to do the same thing with "allowdac" and "nodac" combination. The usedac option enables us to stop via_no_dac() setting forbid_dac to 1. That is, someone who uses VIA bridges can use DAC with this option even if some of VIA bridges seem to be broken about DAC. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: WANG Cong <amwang@redhat.com> Cc: gcosta@redhat.com LKML-Reference: <20091214104423X.fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | doc: Add documentation for bootloader_{type,version}H. Peter Anvin2009-12-111-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add documentation for kernel/bootloader_type and kernel/bootloader_version to sysctl/kernel.txt. This should really have been done a long time ago. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Shen Feng <shen@cn.fujitsu.com>
* | | | Merge branch 'for-linus' of git://neil.brown.name/mdLinus Torvalds2009-12-141-4/+68
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://neil.brown.name/md: (27 commits) md: add 'recovery_start' per-device sysfs attribute md: rcu_read_lock() walk of mddev->disks in md_do_sync() md: integrate spares into array at earliest opportunity. md: move compat_ioctl handling into md.c md: revise Kconfig help for MD_MULTIPATH md: add MODULE_DESCRIPTION for all md related modules. raid: improve MD/raid10 handling of correctable read errors. md/raid10: print more useful messages on device failure. md/bitmap: update dirty flag when bitmap bits are explicitly set. md: Support write-intent bitmaps with externally managed metadata. md/bitmap: move setting of daemon_lastrun out of bitmap_read_sb md: support updating bitmap parameters via sysfs. md: factor out parsing of fixed-point numbers md: support bitmap offset appropriate for external-metadata arrays. md: remove needless setting of thread->timeout in raid10_quiesce md: change daemon_sleep to be in 'jiffies' rather than 'seconds'. md: move offset, daemon_sleep and chunksize out of bitmap structure md: collect bitmap-specific fields into one structure. md/raid1: add takeover support for raid5->raid1 md: add honouring of suspend_{lo,hi} to raid1. ...
| * | | | md: add 'recovery_start' per-device sysfs attributeDan Williams2009-12-141-4/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable external metadata arrays to manage rebuild checkpointing via a md/dev-XXX/recovery_start attribute which reflects rdev->recovery_offset Also update resync_start_store to allow 'none' to be written, for consistency. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
| * | | | md: Support write-intent bitmaps with externally managed metadata.NeilBrown2009-12-141-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In this case, the metadata needs to not be in the same sector as the bitmap. md will not read/write any bitmap metadata. Config must be done via sysfs and when a recovery makes the array non-degraded again, writing 'true' to 'bitmap/can_clear' will allow bits in the bitmap to be cleared again. Signed-off-by: NeilBrown <neilb@suse.de>
| * | | | md: support updating bitmap parameters via sysfs.NeilBrown2009-12-141-0/+29
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A new attribute directory 'bitmap' in 'md' is created which contains files for configuring the bitmap. 'location' identifies where the bitmap is, either 'none', or 'file' or 'sector offset from metadata'. Writing 'location' can create or remove a bitmap. Adding a 'file' bitmap this way is not yet supported. 'chunksize' and 'time_base' must be set before 'location' can be set. 'chunksize' can be set before creating a bitmap, but is currently always over-ridden by the bitmap superblock. 'time_base' and 'backlog' can be updated at any time. Signed-off-by: NeilBrown <neilb@suse.de> Reviewed-by: Andre Noll <maan@systemlinux.org>
* / | | Documentation: rw_lock lessons learnedWilliam Allen Simpson2009-12-141-100/+84
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In recent months, two different network projects erroneously strayed down the rw_lock path. Update the Documentation based upon comments by Eric Dumazet and Paul E. McKenney in those threads. Further updates await somebody else with more expertise. Changes: - Merged with extensive content by Stephen Hemminger. - Fix one of the comments by Linus Torvalds. Signed-off-by: William.Allen.Simpson@gmail.com Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'next' of ↵Linus Torvalds2009-12-124-1/+41
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (151 commits) powerpc: Fix usage of 64-bit instruction in 32-bit altivec code MAINTAINERS: Add PowerPC patterns powerpc/pseries: Track previous CPPR values to correctly EOI interrupts powerpc/pseries: Correct pseries/dlpar.c build break without CONFIG_SMP powerpc: Make "intspec" pointers in irq_host->xlate() const powerpc/8xx: DTLB Miss cleanup powerpc/8xx: Remove DIRTY pte handling in DTLB Error. powerpc/8xx: Start using dcbX instructions in various copy routines powerpc/8xx: Restore _PAGE_WRITETHRU powerpc/8xx: Add missing Guarded setting in DTLB Error. powerpc/8xx: Fixup DAR from buggy dcbX instructions. powerpc/8xx: Tag DAR with 0x00f0 to catch buggy instructions. powerpc/8xx: Update TLB asm so it behaves as linux mm expects. powerpc/8xx: Invalidate non present TLBs powerpc/pseries: Serialize cpu hotplug operations during deactivate Vs deallocate pseries/pseries: Add code to online/offline CPUs of a DLPAR node powerpc: stop_this_cpu: remove the cpu from the online map. powerpc/pseries: Add kernel based CPU DLPAR handling sysfs/cpu: Add probe/release files powerpc/pseries: Kernel DLPAR Infrastructure ...
| * \ \ Merge commit 'origin/master' into nextBenjamin Herrenschmidt2009-12-0942-374/+2200
| |\ \ \ | | | | | | | | | | | | | | | | | | | | Conflicts: include/linux/kvm.h
| * \ \ \ Merge commit 'gcl/next' into nextBenjamin Herrenschmidt2009-12-091-1/+16
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| | * | | | mpc52xx/wdt: OF property to enable the WDT on bootAlbrecht Dreß2009-11-131-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the "fsl,wdt-on-boot" OF property as to reserve a GPT as WDT which may be a requirement in safety-related (e.g. ISO/EN 61508) applications. Signed-off-by: Albrecht Dreß <albrecht.dress@arcor.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | | | sysfs/cpu: Add probe/release filesNathan Fontenot2009-12-091-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Version 3 of this patch is updated with documentation added to Documentation/ABI. There are no changes to any of the C code from v2 of the patch. In order to support kernel DLPAR of CPU resources we need to provide an interface to add (probe) and remove (release) the resource from the system. This patch Creates new generic probe and release sysfs files to facilitate cpu probe/release. The probe/release interface provides for allowing each arch to supply their own routines for implementing the backend of adding and removing cpus to/from the system. This also creates the powerpc specific stubs to handle the arch callouts from writes to the sysfs files. The creation and use of these files is regulated by the CONFIG_ARCH_CPU_PROBE_RELEASE option so that only architectures that need the capability will have the files created. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | | Merge commit 'origin/master' into nextBenjamin Herrenschmidt2009-11-242-4/+4
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| * | | | | | powerpc/pseries: Add hooks to put the CPU into an appropriate offline stateGautham R Shenoy2009-11-241-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a CPU is offlined on POWER currently, we call rtas_stop_self() and hand the CPU back to the resource pool. This path is used for DLPAR which will cause a change in the LPAR configuration which will be visible outside. This patch changes the default state a CPU is put into when it is offlined. On platforms which support ceding the processor to the hypervisor with latency hint specifier value, during a cpu offline operation, instead of calling rtas_stop_self(), we cede the vCPU to the hypervisor while passing a latency hint specifier value. The Hypervisor can use this hint to provide better energy savings. Also, during the offline operation, the control of the vCPU remains with the LPAR as oppposed to returning it to the resource pool. The patch achieves this by creating an infrastructure to set the preferred_offline_state() which can be either - CPU_STATE_OFFLINE: which is the current behaviour of calling rtas_stop_self() - CPU_STATE_INACTIVE: which cedes the vCPU to the hypervisor with the latency hint specifier. The codepath which wants to perform a DLPAR operation can set the preferred_offline_state() of a CPU to CPU_STATE_OFFLINE before invoking cpu_down(). The patch also provides a boot-time command line argument to disable/enable CPU_STATE_INACTIVE. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | | | powerpc/86xx: Add power management support for MPC8610HPCD boardsAnton Vorontsov2009-11-121-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds needed nodes and properties to support suspend/resume on the MPC8610HPCD boards. There is a dedicated switch (SW9) that is used to wake up the boards. By default the SW9 button is routed to IRQ8, but could be re-routed (via PIXIS) to sreset. With 'no_console_suspend' kernel command line argument specified, the board is also able to wakeup upon serial port input. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Scott Wood <scottwood@freescale.com> [dts] Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | | | | | | Merge branch 'omap-for-linus' of ↵Linus Torvalds2009-12-121-0/+5
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (75 commits) omap3: Fix OMAP35XX_REV macros omap: serial: fix non-empty uart fifo read abort omap3: Zoom2/3: Update hsmmc board config params omap3 : Enable TWL4030 Keypad for Zoom2 and Zoom3 boards omap3: id code detection 3525 vs 3515 omap3: rx51: Use wl1251 in SPI mode 3 omap3: zoom2/3: make MMC slot work again omap1: htcherald: Update defconfig to include mux support omap1: LCD_DMA: Use some define rather than a hexadecimal omap: header: remove unused data-type omap: arch/arm/plat-omap/devices.c - sort alphabetically omap: Correcting GPMC_CONFIG1_DEVICETYPE_NAND OMAP3: serial - allow platforms specify which UARTs to initialize omap3: cm-t35: add mux initialization OMAP4: Sync up omap4430 defconfig OMAP4: Remove the secondary wait loop OMAP4: AuxCoreBoot registers only accessible in secure mode OMAP4: Fix SRAM base and size OMAP4: Fix cpu detection omap3: pandora: board file updates for .33 ...
| * | | | | | | omap: mux: Add new style pin multiplexing code for omap3Tony Lindgren2009-12-121-0/+5
| | |_|_|_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initially only for 34xx. This code allows us to: - Make the code more generic as the omap internal signal names can stay the same across omap generations for some devices - Map mux registers to GPIO registers that is needed for dynamic muxing of pins during off-idle - Override bootloader mux values via kernel cmdline using omap_mux=some.signa1=0x1234,some.signal2=0x1234 - View and set the mux registers via debugfs if CONFIG_DEBUG_FS is enabled Cc: Mike Rapoport <mike@compulab.co.il> Cc: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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*---. \ \ \ \ \ \ Merge branches 'slab/fixes', 'slab/kmemleak', 'slub/perf' and 'slub/stats' ↵Pekka Enberg2009-12-121-51/+58
|\ \ \ \ \ \ \ \ \ | | | |_|_|_|/ / / | | |/| | | | | | | | | | | | | | | into for-linus
| | | * | | | | | slub: allow stats to be clearedDavid Rientjes2009-10-151-51/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When collecting slub stats for particular workloads, it's necessary to collect each statistic for all caches before the job is even started because the counters are usually greater than zero just from boot and initialization. This allows a statistic to be cleared on each cpu by writing '0' to its sysfs file. This creates a baseline for statistics of interest before the workload is started. Setting a statistic to a particular value is not supported, so all values written to these files other than '0' returns -EINVAL. Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
* | | | | | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2009-12-121-25/+91
|\ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (75 commits) net: Handle NETREG_UNINITIALIZED devices correctly can: add the driver for Analog Devices Blackfin on-chip CAN controllers xfrm: Fix truncation length of authentication algorithms installed via PF_KEY net: use compat helper functions in compat_sys_recvmmsg net: fix compat_sys_recvmmsg parameter type cxgb3: Fixing EEH handlers cnic: Zero out status block and Event Queue indices. cnic: Send delete command when shutting down iSCSI ring. net: smc91x: Fix up type mismatch in smc_drv_resume(). smc91x: fix unused flags warnings on UP systems MAINTAINERS: Transfering maintainership of cdc-ether net: Add missing TST_CFG_WRITE bits around sky2_pci_write net: Fix Yukon-2 Optima TCP offload setup net: niu uses crc32, so select CRC32 wireless: update old static regulatory domain rules mac80211: Revert 'Use correct sign for mesh active path refresh' mac80211: Fixed bug in mesh portal paths net/mac80211: Correct size given to memset b43: Remove reset after fatal DMA error rtl8187: add radio led and fix warnings on suspend ...
| * \ \ \ \ \ \ \ \ Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller2009-12-1268-405/+1443
| |\ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: include/net/tcp.h
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 00:08:21 +0100