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 <[email protected]>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 4c5fdf5..1c09751 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1511,7 +1511,7 @@ 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);
        }
 }
-- 
1.9.1

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