linux-kernel - Re: [PATCH 0/7] Per-cgroup page stat accounting

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Message-ID: <4FF152E6.70009@gmail.com>
Date:	Mon, 02 Jul 2012 15:51:02 +0800
From:	Sha Zhengju <handai.szj@...il.com>
To:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.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 0/7] Per-cgroup page stat accounting

On 06/29/2012 04:23 PM, Kamezawa Hiroyuki wrote:
> (2012/06/28 19:54), Sha Zhengju wrote:
>> This patch series provide the ability for each memory cgroup to have independent
>> dirty/writeback page stats. This can provide some information for per-cgroup direct
>> reclaim. Meanwhile, we add more detailed dump messages for memcg OOMs.
>>
>> Three features are included in this patch series:
>>   (0).prepare patches for page accounting
>>    1. memcg dirty page accounting
>>    2. memcg writeback page accounting
>>    3. memcg OOMs dump info
>>
>> In (0) prepare patches, we have reworked vfs set page dirty routines to make "modify
>> page info" and "dirty page accouting" stay in one function as much as possible for
>> the sake of memcg bigger lock.
>>
>> These patches are cooked based on Andrew's akpm tree.
>>
> Thank you !, it seems good in general. I'll review in detail, later.
>
> Do you have any performance comparison between before/after the series ?
> I mean, set_page_dirty() is the hot-path and we should be careful to add a new accounting.


Not yet, I sent it out as soon as I worked out this solution to check
whether it's okay.
I can test the series after most of people agree with it.


Thanks,
Sha

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