linux-kernel - Re: [-mm][PATCH 1/4] Add memrlimit controller documentation (v4)

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Message-ID: <482C7F70.2020102@qumranet.com>
Date:	Thu, 15 May 2008 21:22:40 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
CC:	linux-mm@...ck.org, Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Paul Menage <menage@...gle.com>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, Pavel Emelianov <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [-mm][PATCH 1/4] Add memrlimit controller documentation (v4)

Balbir Singh wrote:
> +
> +Advantages of providing this feature
> +
> +1. Control over virtual address space allows for a cgroup to fail gracefully
> +   i.e., via a malloc or mmap failure as compared to OOM kill when no
> +   pages can be reclaimed.
>   

Do you mean by this, limiting the number of pagetable pages (that are 
pinned in memory), this preventing oom by a cgroup that instantiates 
many pagetables?


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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