linux-kernel - Re: [PATCH 0/2] memcg: fix oom handling

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Message-ID: <49276B79.9060002@cn.fujitsu.com>
Date:	Sat, 22 Nov 2008 10:16:25 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	pbadari@...ibm.com, jblunck@...e.de, taka@...inux.co.jp,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	npiggin@...e.de
Subject: Re: [PATCH 0/2] memcg: fix oom handling

KAMEZAWA Hiroyuki wrote:
> Li Zefan reported
> 
> (a) This goes dead lock:
> ==
>    #echo 0 >  (...)/01/memory.limit_in_bytes   #set memcg's limit to 0,
>    #echo $$ > (...)/01/memory.tasks            #move task
>    # do something...
> ==
> 
> (b) seems to be dead lock
> ==
>    #echo 40k >  (...)/01/memory.limit_in_bytes   #set memcg's limit to 0,
>    #echo $$ > (...)/01/memory.tasks            #move task
>    # do something...
> ==
> 
> 
> I think (a) is BUG. (b) is just slow down.
> (you can see pgpgin/pgpgout count is increasing in (B).)
> 
> This patch set is for handling (a). Li-san, could you check ?

Yes, it works for me now. :)

> This works well in my environment.(means OOM-Killer is called in proper way.)
> 

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