diff options
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index d0ed1905a85c..12a900dbb819 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -232,6 +232,26 @@ void tick_nohz_full_kick_all(void) preempt_enable(); } +/* + * Re-evaluate the need for the tick as we switch the current task. + * It might need the tick due to per task/process properties: + * perf events, posix cpu timers, ... + */ +void tick_nohz_task_switch(struct task_struct *tsk) +{ + unsigned long flags; + + if (!tick_nohz_full_cpu(smp_processor_id())) + return; + + local_irq_save(flags); + + if (tick_nohz_tick_stopped() && !can_stop_full_tick()) + tick_nohz_full_kick(); + + local_irq_restore(flags); +} + int tick_nohz_full_cpu(int cpu) { if (!have_nohz_full_mask) |