diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/tick-sched.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 4012da672821..6737d68fdb8d 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -639,9 +639,15 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer) * into a long sleep. If two cpus happen to assign themself to * this duty, then the jiffies update is still serialized by * xtime_lock. + * + * Also check if the do_timer duty is stuck with off-line cpu. + * Then, use the same remedy as for dropped duty: re-assign it + * to the cpu servicing this tick. */ - if (unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE)) + if ((unlikely(tick_do_timer_cpu == TICK_DO_TIMER_NONE)) || + (!cpu_online(tick_do_timer_cpu))) { tick_do_timer_cpu = cpu; + } #endif /* Check, if the jiffies need an update */ |