Date: Tue, 14 Feb 2012 17:38:21 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-media@vger.kernel.org, linux-mm@kvack.org,
        linaro-mm-sig@lists.linaro.org, Michal Nazarewicz <mina86@mina86.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        Russell King <linux@arm.linux.org.uk>,
        Andrew Morton <akpm@linux-foundation.org>,
        Daniel Walker <dwalker@codeaurora.org>, Mel Gorman <mel@csn.ul.ie>,
        Arnd Bergmann <arnd@arndb.de>, Jesse Barker <jesse.barker@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Shariq Hasnain <shariq.hasnain@linaro.org>,
        Chunsang Jeong <chunsang.jeong@linaro.org>,
        Dave Hansen <dave@linux.vnet.ibm.com>,
        Benjamin Gaignard <benjamin.gaignard@linaro.org>,
        Rob Clark <rob.clark@linaro.org>, Ohad Ben-Cohen <ohad@wizery.com>
Subject: Re: [PATCHv21 10/16] mm: Serialize access to min_free_kbytes
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On Fri, 10 Feb 2012 18:32:25 +0100
Marek Szyprowski <m.szyprowski@samsung.com> wrote:

> From: Mel Gorman <mgorman@suse.de>
> 
> 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@chello.nl: Older patch fixed the race with spinlock]
> Signed-off-by: Mel Gorman <mgorman@suse.de>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

At linux-next, conflicted with "mm: add extra free kbytes tunable"

To the logic,
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

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