linux-kernel - Re: [tip:sched/core] sched/numa: Rewrite the CONFIG

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Date:	Tue, 29 May 2012 10:19:37 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Tony Luck <tony.luck@...el.com>, mingo@...nel.org,
	torvalds@...ux-foundation.org, cmetcalf@...era.com,
	sivanich@....com, akpm@...ux-foundation.org, ralf@...ux-mips.org,
	greg.pearson@...com, ink@...assic.park.msu.ru, tglx@...utronix.de,
	rth@...ddle.net, kamezawa.hiroyu@...fujitsu.com, paulus@...ba.org,
	linux-kernel@...r.kernel.org, hpa@...or.com, lethal@...ux-sh.org,
	davem@...emloft.net, benh@...nel.crashing.org, dhowells@...hat.com,
	mattst88@...il.com, fenghua.yu@...el.com, shangw@...ux.vnet.ibm.com
Subject: Re: [tip:sched/core] sched/numa: Rewrite the CONFIG_NUMA sched
 domain support


Hi Peter,

We have a number of ppc64 boxes that are hitting this and have
verified that the patch fixes it.

Tested-by: Anton Blanchard <anton@...ba.org>

Thanks!
Anton

---
Subject: sched: Don't try allocating memory from offline nodes
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Date: Fri May 25 09:26:43 CEST 2012

Allocators don't appreciate it when you try and allocate memory from
offline nodes.

Reported-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
 kernel/sched/core.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux-2.6/kernel/sched/core.c
===================================================================
--- linux-2.6.orig/kernel/sched/core.c
+++ linux-2.6/kernel/sched/core.c
@@ -6449,7 +6449,7 @@ static void sched_init_numa(void)
 			return;
 
 		for (j = 0; j < nr_node_ids; j++) {
-			struct cpumask *mask = kzalloc_node(cpumask_size(), GFP_KERNEL, j);
+			struct cpumask *mask = kzalloc(cpumask_size(), GFP_KERNEL);
 			if (!mask)
 				return;
 


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