linux-kernel - Re: [PATCH 5/7] hugetlb: pin oldpage in page migration

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Message-ID: <20100705094517.GB8510@basil.fritz.box>
Date:	Mon, 5 Jul 2010 11:45:17 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Jun'ichi Nomura <j-nomura@...jp.nec.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/7] hugetlb: pin oldpage in page migration

On Fri, Jul 02, 2010 at 02:47:24PM +0900, Naoya Horiguchi wrote:
> This patch introduces pinning the old page during page migration
> to avoid freeing it before we complete copying.
> This race condition can happen for privately mapped or anonymous hugepage.

Patch looks good.
-Andi
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