diff options
Diffstat (limited to 'kernel/sched/deadline.c')
| -rw-r--r-- | kernel/sched/deadline.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index a027799..3fa8fa6 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -511,16 +511,10 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer) struct sched_dl_entity, dl_timer); struct task_struct *p = dl_task_of(dl_se); + unsigned long flags; struct rq *rq; -again: - rq = task_rq(p); - raw_spin_lock(&rq->lock); - if (rq != task_rq(p)) { - /* Task was moved, retrying. */ - raw_spin_unlock(&rq->lock); - goto again; - } + rq = task_rq_lock(current, &flags); /* * We need to take care of several possible races here: @@ -541,6 +535,26 @@ again: sched_clock_tick(); update_rq_clock(rq); + + /* + * If the throttle happened during sched-out; like: + * + * schedule() + * deactivate_task() + * dequeue_task_dl() + * update_curr_dl() + * start_dl_timer() + * __dequeue_task_dl() + * prev->on_rq = 0; + * + * We can be both throttled and !queued. Replenish the counter + * but do not enqueue -- wait for our wakeup to do that. + */ + if (!task_on_rq_queued(p)) { + replenish_dl_entity(dl_se, dl_se); + goto unlock; + } + enqueue_task_dl(rq, p, ENQUEUE_REPLENISH); if (dl_task(rq->curr)) check_preempt_curr_dl(rq, p, 0); @@ -555,7 +569,7 @@ again: push_dl_task(rq); #endif unlock: - raw_spin_unlock(&rq->lock); + task_rq_unlock(rq, current, &flags); return HRTIMER_NORESTART; } @@ -898,6 +912,7 @@ static void yield_task_dl(struct rq *rq) rq->curr->dl.dl_yielded = 1; p->dl.runtime = 0; } + update_rq_clock(rq); update_curr_dl(rq); } |
