[PATCH] avoid race condition in pick_next_task_fair in

[Wang Sheng-Hui]

Signed-off-by: Wang Sheng-Hui <crosslonelyover@xxxxxxxxx>
---
 kernel/sched_fair.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index eed35ed..93073ff 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -823,9 +823,9 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct
sched_entity *se, int flags)

 	clear_buddies(cfs_rq, se);

+	account_entity_dequeue(cfs_rq, se);
 	if (se != cfs_rq->curr)
 		__dequeue_entity(cfs_rq, se);
-	account_entity_dequeue(cfs_rq, se);
 	update_min_vruntime(cfs_rq);

 	/*
@@ -1059,7 +1059,7 @@ enqueue_task_fair(struct rq *rq, struct
task_struct *p, int flags)
 }

 /*
- * The dequeue_task method is called before nr_running is
+ * The dequeue_task method is called after nr_running is
  * decreased. We remove the task from the rbtree and
  * update the fair scheduling stats:
  */
-- 
1.6.3.3



-- 


Thanks and Best Regards,
shenghui
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