linux-kernel - Re: [PATCH 1/4] per-task-delay-accounting: add memory reclaim delay

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Message-Id: <20080605092451.9C1D.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Thu, 05 Jun 2008 09:50:48 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Keika Kobayashi <kobayashi.kk@...s.nec.co.jp>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH 1/4] per-task-delay-accounting: add memory reclaim delay

> >> +	delayacct_freepages_start();
> >>  	did_some_progress = try_to_free_pages(zonelist, order, gfp_mask);
> >> +	delayacct_freepages_end();
> > 
> > Shouldn't we consider memcgroup reclaim?
> 
> thanks for pointing this.
> Unfortunately, we're not so familiar to memcgroup.
> Will look into this.
> Could you tell us pointers to memcgroup?

Documentation/controllers/memory.txt is good guide :)

<abstract>
try_to_free_pages():	         global reclaim entry point
try_to_free_mem_cgroup_pages():  memcgroup reclaim entry point
do_try_to_free_pages():	         common layer


Unfortunately, I don't know your requirement and
memcgroup reclaim shold be mesured.
I hope you explain your purpose and benefit more.

Thanks.

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