From: Chen Xiaoguang <xiaoggc...@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 <heddc...@tencent.com>
Signed-off-by: Xiaoguang Chen <xiaoggc...@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
