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Date: Tue, 16 Nov 2010 12:37:28 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Greg Thelen <gthelen@google.com>, Minchan Kim <minchan.kim@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dave Young <hidave.darkstar@gmail.com>,
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        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 1/4] memcg: use native word to represent dirtyable pages
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On Sun,  7 Nov 2010 23:14:36 +0100
Johannes Weiner <hannes@cmpxchg.org> wrote:

> The memory cgroup dirty info calculation currently uses a signed
> 64-bit type to represent the amount of dirtyable memory in pages.
> 
> This can instead be changed to an unsigned word, which will allow the
> formula to function correctly with up to 160G of LRU pages on a 32-bit
> system, assuming 4k pages.  That should be plenty even when taking
> racy folding of the per-cpu counters into account.
> 
> This fixes a compilation error on 32-bit systems as this code tries to
> do 64-bit division.
> 
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Reported-by: Dave Young <hidave.darkstar@gmail.com>


Thank you.

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

I couldn't read email because of vacation.

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