[PATCH 2/2] sched/rt: Optimizate task_woken_rt()

[Xunlei Pang <xlpang@126.com>]

From: Xunlei Pang <pang.xunlei@linaro.org>

- Remove "has_pushable_tasks(rq)" condition, because for queued p,
"!task_running(rq, p)" and "p->nr_cpus_allowed > 1" implies true
"has_pushable_tasks(rq)".

- Remove "!test_tsk_need_resched(rq->curr)" condition, because
the flag might be set right before the waking up, but we still
need to push equal or lower priority tasks, it should be removed.
Without this condition, we actually get the right logic.

Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
---
 kernel/sched/rt.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index a9d33a3..9d735da 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -2233,8 +2233,6 @@ out:
 static void task_woken_rt(struct rq *rq, struct task_struct *p)
 {
 	if (!task_running(rq, p) &&
-	    !test_tsk_need_resched(rq->curr) &&
-	    has_pushable_tasks(rq) &&
 	    p->nr_cpus_allowed > 1 &&
 	    (dl_task(rq->curr) || rt_task(rq->curr)) &&
 	    (rq->curr->nr_cpus_allowed < 2 ||
-- 
1.9.1