[PATCH] sched: don't check rq after newidle_balance return positive

[chenxg1x@gmail.com]

From: Chen Xiaoguang <xiaoggchen@tencent.com>

In pick_next_task_fair, if CPU is going to idle newidle_balance
is called first trying to pull some tasks.
When newidle_balance returns positive which means it does
pulls tasks or some tasks enqueued then there is no need to check
sched_fair_runnable again.

Signed-off-by: He Chen <heddchen@tencent.com>
Signed-off-by: Xiaoguang Chen <xiaoggchen@tencent.com>
---
 kernel/sched/fair.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index ae7ceba..c2f7eac 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7004,10 +7004,9 @@ struct task_struct *
 	struct task_struct *p;
 	int new_tasks;
 
-again:
 	if (!sched_fair_runnable(rq))
 		goto idle;
-
+again:
 #ifdef CONFIG_FAIR_GROUP_SCHED
 	if (!prev || prev->sched_class != &fair_sched_class)
 		goto simple;
-- 
1.8.3.1