linux-kernel - Re: [PATCH 01/15] mm: Serialize access to min_free

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Message-ID: <4F32C35F.1090806@redhat.com>
Date:	Wed, 08 Feb 2012 13:47:59 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-MM <linux-mm@...ck.org>,
	Linux-Netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>, Neil Brown <neilb@...e.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 01/15] mm: Serialize access to min_free_kbytes

On 02/06/2012 05:56 PM, Mel Gorman wrote:
> There is a race between the min_free_kbytes sysctl, memory hotplug
> and transparent hugepage support enablement.  Memory hotplug uses a
> zonelists_mutex to avoid a race when building zonelists. Reuse it to
> serialise watermark updates.
>
> [a.p.zijlstra@...llo.nl: Older patch fixed the race with spinlock]
> Signed-off-by: Mel Gorman<mgorman@...e.de>

Reviewed-by: Rik van Riel <riel@...hat.com>

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