diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/hrtimer.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 9002958a96e..126b9808f28 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -206,8 +206,19 @@ switch_hrtimer_base(struct hrtimer *timer, struct hrtimer_clock_base *base, #if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP) if (!pinned && get_sysctl_timer_migration() && idle_cpu(cpu)) { preferred_cpu = get_nohz_load_balancer(); - if (preferred_cpu >= 0) - cpu = preferred_cpu; + if (preferred_cpu >= 0) { + /* + * We must not check the expiry value when + * preferred_cpu is the current cpu. If base + * != new_base we would loop forever when the + * timer expires before the current programmed + * next timer event. + */ + if (preferred_cpu != cpu) + cpu = preferred_cpu; + else + preferred_cpu = -1; + } } #endif |