netdev - Re: [PATCH 01/16] mm: Serialize access to min_free

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Message-ID: <alpine.DEB.2.00.1204231623210.17030@chino.kir.corp.google.com>
Date:	Mon, 23 Apr 2012 16:50:48 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.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>,
	Mike Christie <michaelc@...wisc.edu>,
	Eric B Munson <emunson@...bm.net>
Subject: Re: [PATCH 01/16] mm: Serialize access to min_free_kbytes

On Mon, 16 Apr 2012, 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>

Acked-by: David Rientjes <rientjes@...gle.com>
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