linux-kernel - [PATCH] sched/fair: use RETRY_TASK in idle

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Date:   Thu, 26 Apr 2018 12:37:02 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     peterz@...radead.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH] sched/fair: use RETRY_TASK in idle_balance

Use RETRY_TASK in idle_balance when we want select_task_rq() function to 
rerun the complete task selection path

Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 0951d1c..ba49f83 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9862,7 +9862,7 @@ static int idle_balance(struct rq *this_rq, struct rq_flags *rf)
 
 	/* Is there a task of a high priority class? */
 	if (this_rq->nr_running != this_rq->cfs.h_nr_running)
-		pulled_task = -1;
+		pulled_task = RETRY_TASK;
 
 	if (pulled_task)
 		this_rq->idle_stamp = 0;
-- 
2.7.4