Messages in this thread Patch in this message | | | From | Joonwoo Park <> | Subject | [PATCH 1/2] timer: avoid unnecessary waking up of nohz CPU | Date | Mon, 27 Apr 2015 19:21:49 -0700 |
| |
At present, internal_add_timer() examines flags with 'base' which doesn't contain flags. Examine with 'timer->base' to avoid unnecessary waking up of nohz CPU when timer base has TIMER_DEFERRABLE.
CC: Thomas Gleixner <tglx@linutronix.de> CC: John Stultz <john.stultz@linaro.org> Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org> --- kernel/time/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 2ece3aa..e5d5733c 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -434,7 +434,7 @@ static void internal_add_timer(struct tvec_base *base, struct timer_list *timer) * require special care against races with idle_cpu(), lets deal * with that later. */ - if (!tbase_get_deferrable(base) || tick_nohz_full_cpu(base->cpu)) + if (!tbase_get_deferrable(timer->base) || tick_nohz_full_cpu(base->cpu)) wake_up_nohz_cpu(base->cpu); } -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation
| |