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authorLinus Torvalds <torvalds@linux-foundation.org>2012-06-04 11:25:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-04 11:25:31 -0700
commitc22072bdf053b115a1126658100967dda00b5ecf (patch)
tree21520119dbbfce237a5005e9840105e86944c9cc /Documentation/kernel-parameters.txt
parent0640113be25d283e0ff77a9f041e1242182387f0 (diff)
parent62cf20b32aee4ae889a2eb40fd41c0eab73de970 (diff)
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner: "The clocksource driver is pure hardware enablement and the skew option is default off, well tested and non dangerous." * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tick: Move skew_tick option into the HIGH_RES_TIMER section clocksource: em_sti: Add DT support clocksource: em_sti: Emma Mobile STI driver clockevents: Make clockevents_config() a global symbol tick: Add tick skew boot option
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diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c45513d806a..a92c5ebf373 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2543,6 +2543,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
sched_debug [KNL] Enables verbose scheduler debug messages.
+ skew_tick= [KNL] Offset the periodic timer tick per cpu to mitigate
+ xtime_lock contention on larger systems, and/or RCU lock
+ contention on all systems with CONFIG_MAXSMP set.
+ Format: { "0" | "1" }
+ 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
+ 1 -- enable.
+ Note: increases power consumption, thus should only be
+ enabled if running jitter sensitive (HPC/RT) workloads.
+
security= [SECURITY] Choose a security module to enable at boot.
If this boot parameter is not specified, only the first
security module asking for security registration will be