Messages in this thread Patch in this message | | | From | Wanpeng Li <> | Subject | [PATCH 2/2] sched/deadline: fix pull if dl task who's prio changed is not on queue | Date | Wed, 19 Nov 2014 16:35:03 +0800 |
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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.li@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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