summaryrefslogtreecommitdiffstats
path: root/kernel/sched/deadline.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sched/deadline.c')
-rw-r--r--kernel/sched/deadline.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 27ef409..b080957 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1021,8 +1021,17 @@ struct task_struct *pick_next_task_dl(struct rq *rq, struct task_struct *prev)
dl_rq = &rq->dl;
- if (need_pull_dl_task(rq, prev))
+ if (need_pull_dl_task(rq, prev)) {
pull_dl_task(rq);
+ /*
+ * pull_rt_task() can drop (and re-acquire) rq->lock; this
+ * means a stop task can slip in, in which case we need to
+ * re-start task selection.
+ */
+ if (rq->stop && rq->stop->on_rq)
+ return RETRY_TASK;
+ }
+
/*
* When prev is DL, we may throttle it in put_prev_task().
* So, we update time before we check for dl_nr_running.
OpenPOWER on IntegriCloud