Dl task who is not on queue and it is also the curr task simultaneously
can not happen. In addition, pull since the priority of a not on queue
dl task doesn't make any sense.
This patch fix it by don't pull if dl task who's prio changed is not on
queue.
Signed-off-by: Wanpeng Li <wanpeng...@linux.intel.com>
---
kernel/sched/deadline.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index b9e44ae..4eaf55c 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1678,7 +1678,10 @@ static void switched_to_dl(struct rq *rq, struct
task_struct *p)
static void prio_changed_dl(struct rq *rq, struct task_struct *p,
int oldprio)
{
- if (task_on_rq_queued(p) || rq->curr == p) {
+ if (!task_on_rq_queued(p))
+ return;
+
+ if (rq->curr == p) {
#ifdef CONFIG_SMP
/*
* This might be too much, but unfortunately
--
1.9.1
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