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From: Greg Thelen <gthelen@google.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dave Young <hidave.darkstar@gmail.com>,
        Andrea Righi <arighi@develer.com>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
        Balbir Singh <balbir@linux.vnet.ibm.com>,
        Wu Fengguang <fengguang.wu@intel.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [patch 4/4] memcg: use native word page statistics counters
References: <1288973333-7891-1-git-send-email-minchan.kim@gmail.com>
	<20101106010357.GD23393@cmpxchg.org>
	<AANLkTin9m65JVKRuStZ1-qhU5_1AY-GcbBRC0TodsfYC@mail.gmail.com>
	<20101107215030.007259800@cmpxchg.org>
	<20101107220353.964566018@cmpxchg.org>
	<AANLkTinLK5DiG3ZkEFSAJNZrPKK7aXiPPYQ6z9M6RPhc@mail.gmail.com>
Date: Mon, 08 Nov 2010 14:51:01 -0800
In-Reply-To: <AANLkTinLK5DiG3ZkEFSAJNZrPKK7aXiPPYQ6z9M6RPhc@mail.gmail.com>
	(Minchan Kim's message of "Mon, 8 Nov 2010 09:01:54 +0900")
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Minchan Kim <minchan.kim@gmail.com> writes:

> On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner <hannes@cmpxchg.org> wrote:
>> The statistic counters are in units of pages, there is no reason to
>> make them 64-bit wide on 32-bit machines.
>>
>> Make them native words.  Since they are signed, this leaves 31 bit on
>> 32-bit machines, which can represent roughly 8TB assuming a page size
>> of 4k.
>>
>> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Greg Thelen <gthelen@google.com>
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