[PATCH] sched/deadline: reschedule from switched_from_dl() after a successful pull

[Juri Lelli]

In switched_from_dl() we have to issue a resched if we
successfully pulled some task from other cpus.
This patch also aligns the behaviour with -rt.

Signed-off-by: Juri Lelli <juri.lelli@xxxxxxx>
Suggested-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxxxxxx>
---
 kernel/sched/deadline.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index db6ad38..e8943fc 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1623,8 +1623,11 @@ static void switched_from_dl(struct rq *rq, struct task_struct *p)
 	 * this is the right place to try to pull some other one
 	 * from an overloaded cpu, if any.
 	 */
-	if (!rq->dl.dl_nr_running)
-		pull_dl_task(rq);
+	if (!task_on_rq_queued(p) || rq->dl.dl_nr_running)
+		return;
+
+	if (pull_dl_task(rq))
+		resched_curr(rq);
 #endif
 }
 
-- 
2.1.2

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