From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 20 Sep 2007 14:59:18 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
Subject: Re: [patch 4/9] oom: add per-zone locking
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To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <andrea@suse.de>, Rik van Riel <riel@redhat.com>, linux-mm@kvack.org
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On Thu, 20 Sep 2007, David Rientjes wrote:

> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -27,6 +27,7 @@
>  #include <linux/notifier.h>
>  
>  int sysctl_panic_on_oom;
> +static DEFINE_MUTEX(zone_scan_mutex);
>  /* #define DEBUG */

Use testset/testclear bitops instead of adding a lock?

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