sched/deadline: Push task away if the deadline is equal to curr during wakeup

This patch pushes task away if the dealine of the task is equal
to current during wake up. The same behavior as rt class.

Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1414708776-124078-4-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 8867a67b8f0a063b2585791a8e22c3261d5e39f5..e7779b3feec4c1fec1e5cb763b8606bccb000a6a 100644 (file)
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1506,7 +1506,7 @@ static void task_woken_dl(struct rq *rq, struct task_struct *p)
            p->nr_cpus_allowed > 1 &&
            dl_task(rq->curr) &&
            (rq->curr->nr_cpus_allowed < 2 ||
-            dl_entity_preempt(&rq->curr->dl, &p->dl))) {
+            !dl_entity_preempt(&p->dl, &rq->curr->dl))) {
                push_dl_tasks(rq);
        }
 }