linux-kernel - [tip:sched/core] sched: Update shares on idle

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Message-ID: <tip-c66eaf619c0c7937e9ded160ae83b5a7a6b19b56@git.kernel.org>
Date:	Thu, 18 Nov 2010 14:12:38 GMT
From:	tip-bot for Paul Turner <pjt@...gle.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, pjt@...gle.com, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:sched/core] sched: Update shares on idle_balance

Commit-ID:  c66eaf619c0c7937e9ded160ae83b5a7a6b19b56
Gitweb:     http://git.kernel.org/tip/c66eaf619c0c7937e9ded160ae83b5a7a6b19b56
Author:     Paul Turner <pjt@...gle.com>
AuthorDate: Mon, 15 Nov 2010 15:47:07 -0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 18 Nov 2010 13:27:49 +0100

sched: Update shares on idle_balance

Since shares updates are no longer expensive and effectively local, update them
at idle_balance().  This allows us to more quickly redistribute shares to
another cpu when our load becomes idle.

Signed-off-by: Paul Turner <pjt@...gle.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <20101115234938.204191702@...gle.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/sched_fair.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 6c84439..33f941d 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -3343,6 +3343,7 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
 	 */
 	raw_spin_unlock(&this_rq->lock);
 
+	update_shares(this_cpu);
 	for_each_domain(this_cpu, sd) {
 		unsigned long interval;
 		int balance = 1;
--
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