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Date:	Tue, 16 Nov 2010 12:37:28 +0900
From:	KAMEZAWA Hiroyuki <>
To:	Johannes Weiner <>
Cc:	Greg Thelen <>,
	Minchan Kim <>,
	Andrew Morton <>,
	Dave Young <>,
	Andrea Righi <>,
	Daisuke Nishimura <>,
	Balbir Singh <>,
	Wu Fengguang <>,,
Subject: Re: [patch 1/4] memcg: use native word to represent dirtyable pages

On Sun,  7 Nov 2010 23:14:36 +0100
Johannes Weiner <> 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 <>
> Reported-by: Dave Young <>

Thank you.

Acked-by: KAMEZAWA Hiroyuki <>

I couldn't read email because of vacation.

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