linux-kernel - Re: [PATCH] fix OOM killing processes wrongly thought MPOL

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Message-Id: <20070419092903.a286be3a.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 19 Apr 2007 09:29:03 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	akpm@...ux-foundation.org, clameter@...r.sgi.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix OOM killing processes wrongly thought MPOL_BIND

On Wed, 18 Apr 2007 20:35:22 +0100 (BST)
Hugh Dickins <hugh@...itas.com> wrote:

> I only have CONFIG_NUMA=y for build testing: surprised when trying a memhog
> to see lots of other processes killed with "No available memory (MPOL_BIND)".
> memhog is killed correctly once we initialize nodemask in constrained_alloc().
> 

thank you for catching bug.

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


> Signed-off-by: Hugh Dickins <hugh@...itas.com>
> ---
> Perhaps appropriate for 2.6.20-stable too - regression since 2.6.19.
> 
>  mm/oom_kill.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> --- 2.6.21-rc7/mm/oom_kill.c	2007-03-26 07:30:54.000000000 +0100
> +++ linux/mm/oom_kill.c	2007-04-18 20:18:21.000000000 +0100
> @@ -176,6 +176,8 @@ static inline int constrained_alloc(stru
>  	struct zone **z;
>  	nodemask_t nodes;
>  	int node;
> +
> +	nodes_clear(nodes);
>  	/* node has memory ? */
>  	for_each_online_node(node)
>  		if (NODE_DATA(node)->node_present_pages)
> -
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