We are taking cpu_base->lock for every clock-base in hrtimer_run_queues() and there is nothing in there which prevents us to take this lock only once. Modify code to take lock only once for a cpu_base.
Signed-off-by: Viresh Kumar <[email protected]> --- kernel/hrtimer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 2d9a7e2..c712960 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1466,8 +1466,8 @@ void hrtimer_run_queues(void) if (cpu_base->active_bases) hrtimer_get_softirq_time(cpu_base); + raw_spin_lock(&cpu_base->lock); for_each_active_base(index, base, cpu_base, active_bases) { - raw_spin_lock(&cpu_base->lock); while ((node = timerqueue_getnext(&base->active))) { struct hrtimer *timer; @@ -1478,8 +1478,8 @@ void hrtimer_run_queues(void) __run_hrtimer(timer, &base->softirq_time); } - raw_spin_unlock(&cpu_base->lock); } + raw_spin_unlock(&cpu_base->lock); } /* -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
