diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/tick-sched.c | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index a402608..360674c 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -98,6 +98,28 @@ static ktime_t tick_init_jiffy_update(void) return period; } + +static void tick_sched_do_timer(ktime_t now) +{ + int cpu = smp_processor_id(); + +#ifdef CONFIG_NO_HZ + /* + * Check if the do_timer duty was dropped. We don't care about + * concurrency: This happens only when the cpu in charge went + * into a long sleep. If two cpus happen to assign themself to + * this duty, then the jiffies update is still serialized by + * xtime_lock. + */ + if (unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE)) + tick_do_timer_cpu = cpu; +#endif + + /* Check, if the jiffies need an update */ + if (tick_do_timer_cpu == cpu) + tick_do_update_jiffies64(now); +} + /* * NOHZ - aka dynamic tick functionality */ @@ -648,24 +670,11 @@ static void tick_nohz_handler(struct clock_event_device *dev) { struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); struct pt_regs *regs = get_irq_regs(); - int cpu = smp_processor_id(); ktime_t now = ktime_get(); dev->next_event.tv64 = KTIME_MAX; - /* - * Check if the do_timer duty was dropped. We don't care about - * concurrency: This happens only when the cpu in charge went - * into a long sleep. If two cpus happen to assign themself to - * this duty, then the jiffies update is still serialized by - * xtime_lock. - */ - if (unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE)) - tick_do_timer_cpu = cpu; - - /* Check, if the jiffies need an update */ - if (tick_do_timer_cpu == cpu) - tick_do_update_jiffies64(now); + tick_sched_do_timer(now); /* * When we are idle and the tick is stopped, we have to touch @@ -802,23 +811,8 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer) container_of(timer, struct tick_sched, sched_timer); struct pt_regs *regs = get_irq_regs(); ktime_t now = ktime_get(); - int cpu = smp_processor_id(); -#ifdef CONFIG_NO_HZ - /* - * Check if the do_timer duty was dropped. We don't care about - * concurrency: This happens only when the cpu in charge went - * into a long sleep. If two cpus happen to assign themself to - * this duty, then the jiffies update is still serialized by - * xtime_lock. - */ - if (unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE)) - tick_do_timer_cpu = cpu; -#endif - - /* Check, if the jiffies need an update */ - if (tick_do_timer_cpu == cpu) - tick_do_update_jiffies64(now); + tick_sched_do_timer(now); /* * Do not call, when we are not in irq context and have |
