linux-kernel - Re: [PATCH 6/7] memcg: add per cgroup writeback pages accounting

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Date:	Tue, 03 Jul 2012 15:31:26 +0900
From:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Sha Zhengju <handai.szj@...il.com>
CC:	linux-mm@...ck.org, cgroups@...r.kernel.org, gthelen@...gle.com,
	yinghan@...gle.com, akpm@...ux-foundation.org, mhocko@...e.cz,
	linux-kernel@...r.kernel.org, Sha Zhengju <handai.szj@...bao.com>
Subject: Re: [PATCH 6/7] memcg: add per cgroup writeback pages accounting

(2012/06/28 20:05), Sha Zhengju wrote:
> From: Sha Zhengju <handai.szj@...bao.com>
> 
> Similar to dirty page, we add per cgroup writeback pages accounting. The lock
> rule still is:
> 	mem_cgroup_begin_update_page_stat()
> 	modify page WRITEBACK stat
> 	mem_cgroup_update_page_stat()
> 	mem_cgroup_end_update_page_stat()
> 
> There're two writeback interface to modify: test_clear/set_page_writeback.
> 
> Signed-off-by: Sha Zhengju <handai.szj@...bao.com>

Seems good to me. BTW, you named macros as MEM_CGROUP_STAT_FILE_XXX
but I wonder these counters will be used for accounting swap-out's dirty pages..

STAT_DIRTY, STAT_WRITEBACK ? do you have better name ?

Thanks,
-Kame

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