linux-kernel - [PATCH 07/97] sched: Select_task_rq_fair() must honour SD_LOAD

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Date:	Mon,  4 Jan 2010 16:32:20 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>, Ingo Molnar <mingo@...e.hu>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 07/97] sched: Select_task_rq_fair() must honour SD_LOAD_BALANCE

From: Peter Zijlstra <a.p.zijlstra@...llo.nl>

commit e4f4288842ee12747e10c354d72be7d424c0b627 upstream.

We should skip !SD_LOAD_BALANCE domains.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Mike Galbraith <efault@....de>
LKML-Reference: <20091216170517.653578430@...llo.nl>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 kernel/sched_fair.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 5488a5d..199228b 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1374,6 +1374,9 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
 
 	rcu_read_lock();
 	for_each_domain(cpu, tmp) {
+		if (!(tmp->flags & SD_LOAD_BALANCE))
+			continue;
+
 		/*
 		 * If power savings logic is enabled for a domain, see if we
 		 * are not overloaded, if so, don't balance wider.
-- 
1.6.6

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