linux-kernel - Re: [PATCH mmotm 1/2] memcg: add interface to reset limits

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Date:	Wed, 03 Jun 2009 13:16:27 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
CC:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Paul Menage <menage@...gle.com>
Subject: Re: [PATCH mmotm 1/2] memcg: add interface to reset limits

Daisuke Nishimura wrote:
> Setting mem.limit or memsw.limit to 0 has no meaning
> in actual use(no process can run in such condition).
> 

I wrote a test program that set mem.limit to 0 to test
oom in memcg, and now it is in LTP, though I can modify
it accordingly.

> We don't have interface to reset mem.limit or memsw.limit now,
> so let's reset the mem.limit or memsw.limit to default(unlimited)
> when they are being set to 0.
> 

The idea of having a way to set the limit to unlimited is good,
but how about allow this by writing -1 to mem.limit?


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