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authorIngo Molnar <mingo@kernel.org>2014-06-25 07:37:49 +0200
committerIngo Molnar <mingo@kernel.org>2014-06-25 07:37:49 +0200
commit5cfec3422adcc1987a1b5fc5ff59ad42a1bc910e (patch)
treeefb9591a225f1c760ab26a951f7c8623368225b2 /Documentation/kernel-parameters.txt
parentLinux 3.16-rc2 (diff)
parentrcu: Reduce overhead of cond_resched() checks for RCU (diff)
downloadlinux-5cfec3422adcc1987a1b5fc5ff59ad42a1bc910e.tar.xz
linux-5cfec3422adcc1987a1b5fc5ff59ad42a1bc910e.zip
Merge branch 'urgent.2014.06.23a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/urgent
Pull RCU fixes from Paul E. McKenney: " This series includes the following: 1. Export a pair of debug-object interfaces for RCU that will allow the slab allocators to avoid a recursion bug located by Sasha Levin. Strictly speaking, this is not a regression, but it would be good to enable the fix. 2. Address a serious performance regression on an open/close micro-benchmark located by Dave Hansen. The offending commit is ac1bea85781e (Make cond_resched() report RCU quiescent states). " Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 884904975d0b..7ffecb5fd004 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2790,6 +2790,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
leaf rcu_node structure. Useful for very large
systems.
+ rcutree.jiffies_till_sched_qs= [KNL]
+ Set required age in jiffies for a
+ given grace period before RCU starts
+ soliciting quiescent-state help from
+ rcu_note_context_switch().
+
rcutree.jiffies_till_first_fqs= [KNL]
Set delay from grace-period initialization to
first attempt to force quiescent states.