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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-04-01 00:22:26 -0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-04-01 00:22:26 -0400 |
| commit | 399f486286f44d55c4fff0e9cc5d712f2b443489 (patch) | |
| tree | 0c2820b3e04232eaa96f08c1057b87728fb3e7a4 /kernel/timer.c | |
| parent | 481419ec9fbdf3f4ec5389c7e91a81b4a7ebee8d (diff) | |
| parent | a9edadbf790d72adf6ebed476cb5caf7743e7e4a (diff) | |
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 99b00a25f88..b024106daa7 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -451,10 +451,18 @@ void add_timer_on(struct timer_list *timer, int cpu) spin_lock_irqsave(&base->lock, flags); timer_set_base(timer, base); internal_add_timer(base, timer); + /* + * Check whether the other CPU is idle and needs to be + * triggered to reevaluate the timer wheel when nohz is + * active. We are protected against the other CPU fiddling + * with the timer by holding the timer base lock. This also + * makes sure that a CPU on the way to idle can not evaluate + * the timer wheel. + */ + wake_up_idle_cpu(cpu); spin_unlock_irqrestore(&base->lock, flags); } - /** * mod_timer - modify a timer's timeout * @timer: the timer to be modified |