From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Hugh Dickins <hughd@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Hillf Danton <dhillf@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] memcg: revert fix to mapcount check for this release
Date: Tue, 13 Mar 2012 14:13:52 +0900 [thread overview]
Message-ID: <20120313141352.e390056f.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <alpine.LSU.2.00.1203091335020.19372@eggly.anvils>
On Fri, 9 Mar 2012 13:37:32 -0800 (PST)
Hugh Dickins <hughd@google.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@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
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next prev parent reply other threads:[~2012-03-13 5:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 20:13 [PATCH v3 1/2] thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE Naoya Horiguchi
2012-03-02 20:13 ` [PATCH v3 2/2] memcg: avoid THP split in task migration Naoya Horiguchi
2012-03-09 0:30 ` Andrew Morton
2012-03-09 1:47 ` Naoya Horiguchi
2012-03-09 1:16 ` KAMEZAWA Hiroyuki
2012-03-09 2:33 ` Hugh Dickins
2012-03-09 3:24 ` KAMEZAWA Hiroyuki
2012-03-09 4:00 ` KAMEZAWA Hiroyuki
2012-03-09 6:01 ` Daisuke Nishimura
2012-03-09 7:23 ` [PATCH] memcg: fix behavior of shard anon pages at task_move (Was " KAMEZAWA Hiroyuki
2012-03-09 21:05 ` Hugh Dickins
2012-03-09 21:37 ` [PATCH] memcg: revert fix to mapcount check for this release Hugh Dickins
2012-03-09 22:46 ` Naoya Horiguchi
2012-03-13 5:13 ` KAMEZAWA Hiroyuki [this message]
2012-03-13 5:18 ` [PATCH] memcg: fix behavior of shard anon pages at task_move (Was Re: [PATCH v3 2/2] memcg: avoid THP split in task migration KAMEZAWA Hiroyuki
2012-03-09 4:25 ` Naoya Horiguchi
2012-03-09 7:32 ` KAMEZAWA Hiroyuki
2012-03-09 0:33 ` [PATCH v3 1/2] thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE KAMEZAWA Hiroyuki
2012-03-09 23:49 ` David Rientjes
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