linux-kernel - Re: [RFC][PATCH] memcg: show real limit under hierarchy

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Message-Id: <20081211122237.4FF7.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Thu, 11 Dec 2008 12:24:07 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>
Subject: Re: [RFC][PATCH] memcg: show real limit under hierarchy

> I wonder other people who debugs memcg's hierarchy may use similar patches.
> this is my one.
> comments ?
> ==
> From:KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
> Show "real" limit of memcg.
> This helps my debugging and maybe useful for users.
> 
> While testing hierarchy like this
> 
> 	mount -t cgroup none /cgroup -t memory
> 	mkdir /cgroup/A
> 	set use_hierarchy==1 to "A"
> 	mkdir /cgroup/A/01
> 	mkdir /cgroup/A/01/02
> 	mkdir /cgroup/A/01/03
> 	mkdir /cgroup/A/01/03/04
> 	mkdir /cgroup/A/08
> 	mkdir /cgroup/A/08/01
> 	....
> and set each own limit to them, "real" limit of each memcg is unclear.
> This patch shows real limit by checking all ancestors in memory.stat.
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Great!

I hoped to use this patch at hierarchy inactive_ratio debugging ;)



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