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Message-Id: <20120313141352.e390056f.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 13 Mar 2012 14:13:52 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hillf Danton <dhillf@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] memcg: revert fix to mapcount check for this release

On Fri, 9 Mar 2012 13:37:32 -0800 (PST)
Hugh Dickins <hughd@...gle.com> wrote:

> Respectfully revert commit e6ca7b89dc76 "memcg: fix mapcount check
> in move charge code for anonymous page" for the 3.3 release, so that
> it behaves exactly like releases 2.6.35 through 3.2 in this respect.
> 
> Horiguchi-san's commit is correct in itself, 1 makes much more sense
> than 2 in that check; but it does not go far enough - swapcount
> should be considered too - if we really want such a check at all.
> 
> We appear to have reached agreement now, and expect that 3.4 will
> remove the mapcount check, but had better not make 3.3 different.
> 
> Signed-off-by: Hugh Dickins <hughd@...gle.com>

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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