From: Vincent Guittot <vincent.guittot@linaro.org>
Date: Fri, 14 Dec 2018 16:01:56 +0000 (+0100)
Subject: sched/fair: Trigger asym_packing during idle load balance
X-Git-Tag: v5.1-rc1~162^2~28
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=a062d16449c0d2e00d5a54123c9cfadea3f6c763;p=linux-block.git

sched/fair: Trigger asym_packing during idle load balance

Newly idle load balancing is not always triggered when a CPU becomes idle.
This prevents the scheduler from getting a chance to migrate the task
for asym packing.

Enable active migration during idle load balance too.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: valentin.schneider@arm.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 3b61e19b504a..9693cf2ea954 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8832,7 +8832,7 @@ static int need_active_balance(struct lb_env *env)
 {
 	struct sched_domain *sd = env->sd;
 
-	if (env->idle == CPU_NEWLY_IDLE) {
+	if (env->idle != CPU_NOT_IDLE) {
 
 		/*
 		 * ASYM_PACKING needs to force migrate tasks from busy but