linux-kernel - Re: [PATCH v2 2/2] memcg: use native word page statistics counters

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Message-ID: <20110217062859.GH3415@balbir.in.ibm.com>
Date:	Thu, 17 Feb 2011 11:58:59 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Greg Thelen <gthelen@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] memcg: use native word page statistics counters

* Greg Thelen <gthelen@...gle.com> [2011-02-16 21:34:02]:

> From: Johannes Weiner <hannes@...xchg.org>
> 
> 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@...xchg.org>
> Signed-off-by: Greg Thelen <gthelen@...gle.com>


Acked-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
 

-- 
	Three Cheers,
	Balbir
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