diff options
Diffstat (limited to 'kernel/posix-cpu-timers.c')
| -rw-r--r-- | kernel/posix-cpu-timers.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c index c7f31aa272f..79747b7d942 100644 --- a/kernel/posix-cpu-timers.c +++ b/kernel/posix-cpu-timers.c @@ -608,7 +608,8 @@ static DECLARE_WORK(nohz_kick_work, nohz_kick_work_fn); */ static void posix_cpu_timer_kick_nohz(void) { - schedule_work(&nohz_kick_work); + if (context_tracking_is_enabled()) + schedule_work(&nohz_kick_work); } bool posix_cpu_timers_can_stop_tick(struct task_struct *tsk) @@ -1090,7 +1091,8 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) put_task_struct(p); timer->it.cpu.task = p = NULL; timer->it.cpu.expires = 0; - goto out_unlock; + read_unlock(&tasklist_lock); + goto out; } else if (unlikely(p->exit_state) && thread_group_empty(p)) { /* * We've noticed that the thread is dead, but @@ -1099,7 +1101,8 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) */ cpu_timer_sample_group(timer->it_clock, p, &now); clear_dead_task(timer, now); - goto out_unlock; + read_unlock(&tasklist_lock); + goto out; } spin_lock(&p->sighand->siglock); cpu_timer_sample_group(timer->it_clock, p, &now); @@ -1113,10 +1116,11 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) BUG_ON(!irqs_disabled()); arm_timer(timer); spin_unlock(&p->sighand->siglock); - -out_unlock: read_unlock(&tasklist_lock); + /* Kick full dynticks CPUs in case they need to tick on the new timer */ + posix_cpu_timer_kick_nohz(); + out: timer->it_overrun_last = timer->it_overrun; timer->it_overrun = -1; @@ -1256,13 +1260,6 @@ void run_posix_cpu_timers(struct task_struct *tsk) cpu_timer_fire(timer); spin_unlock(&timer->it_lock); } - - /* - * In case some timers were rescheduled after the queue got emptied, - * wake up full dynticks CPUs. - */ - if (tsk->signal->cputimer.running) - posix_cpu_timer_kick_nohz(); } /* |