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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 22:12:07 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 22:12:07 +0900
commit9d55ab71b735621a63c8923ba934d87879847cef (patch)
tree53bc24c37b4366e2b372a59a501be934e404b143 /init
parent4f1cd91497774488ed16119ec3f54b3daf1561de (diff)
parentc1f8d901d828da1df6d384780829952e7912aeba (diff)
downloadlinaro-lsk-9d55ab71b735621a63c8923ba934d87879847cef.tar.gz
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU fixes from Ingo Molnar: "This tree includes a shutdown/cpu-hotplug deadlock fix and a documentation fix." * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rcu: Advise most users not to enable RCU user mode rcu: Grace-period initialization excludes only RCU notifier
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 4c93533da42..89e4cf672df 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -496,6 +496,12 @@ config RCU_USER_QS
excluded from the global RCU state machine and thus doesn't
to keep the timer tick on for RCU.
+ Unless you want to hack and help the development of the full
+ tickless feature, you shouldn't enable this option. It adds
+ unnecessary overhead.
+
+ If unsure say N
+
config RCU_USER_QS_FORCE
bool "Force userspace extended QS by default"
depends on RCU_USER_QS
@@ -504,6 +510,12 @@ config RCU_USER_QS_FORCE
test this feature that treats userspace as an extended quiescent
state until we have a real user like a full adaptive nohz option.
+ Unless you want to hack and help the development of the full
+ tickless feature, you shouldn't enable this option. It adds
+ unnecessary overhead.
+
+ If unsure say N
+
config RCU_FANOUT
int "Tree-based hierarchical RCU fanout value"
range 2 64 if 64BIT