linux-kernel - [tip:smp/hotplug] sched/migration: Move calc_load_migrate() into CPU

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Date:	Fri, 6 May 2016 06:06:49 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, peterz@...radead.org,
	linux-kernel@...r.kernel.org, hpa@...or.com, tglx@...utronix.de
Subject: [tip:smp/hotplug] sched/migration: Move calc_load_migrate() into
 CPU_DYING

Commit-ID:  e9cd8fa4fcfd67c95db9b87c0fff88fa23cb00e5
Gitweb:     http://git.kernel.org/tip/e9cd8fa4fcfd67c95db9b87c0fff88fa23cb00e5
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 10 Mar 2016 12:54:16 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 6 May 2016 14:58:25 +0200

sched/migration: Move calc_load_migrate() into CPU_DYING

It really does not matter when we fold the load for the outgoing cpu. It's
almost dead anyway, so there is no harm if we fail to fold the few
microseconds which are required for going fully away.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Peter Zijlstra <peterz@...radead.org>
Cc: rt@...utronix.de
Link: http://lkml.kernel.org/r/20160310120025.328739226@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/sched/core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index bafc308..688e8a8 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5447,9 +5447,6 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
 		migrate_tasks(rq);
 		BUG_ON(rq->nr_running != 1); /* the migration thread */
 		raw_spin_unlock_irqrestore(&rq->lock, flags);
-		break;
-
-	case CPU_DEAD:
 		calc_load_migrate(rq);
 		break;
 #endif