diff options
| -rw-r--r-- | kernel/time/tick-sched.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 0581c11fe6c6..727c1ae0517a 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c | |||
| @@ -567,11 +567,21 @@ static void tick_nohz_switch_to_nohz(void) | |||
| 567 | static void tick_nohz_kick_tick(int cpu) | 567 | static void tick_nohz_kick_tick(int cpu) |
| 568 | { | 568 | { |
| 569 | struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); | 569 | struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); |
| 570 | ktime_t delta, now; | ||
| 570 | 571 | ||
| 571 | if (!ts->tick_stopped) | 572 | if (!ts->tick_stopped) |
| 572 | return; | 573 | return; |
| 573 | 574 | ||
| 574 | tick_nohz_restart(ts, ktime_get()); | 575 | /* |
| 576 | * Do not touch the tick device, when the next expiry is either | ||
| 577 | * already reached or less/equal than the tick period. | ||
| 578 | */ | ||
| 579 | now = ktime_get(); | ||
| 580 | delta = ktime_sub(ts->sched_timer.expires, now); | ||
| 581 | if (delta.tv64 <= tick_period.tv64) | ||
| 582 | return; | ||
| 583 | |||
| 584 | tick_nohz_restart(ts, now); | ||
| 575 | } | 585 | } |
| 576 | 586 | ||
| 577 | #else | 587 | #else |
