From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764143AbYEOSW7 (ORCPT ); Thu, 15 May 2008 14:22:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758379AbYEOSWo (ORCPT ); Thu, 15 May 2008 14:22:44 -0400 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:40766 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763957AbYEOSWn (ORCPT ); Thu, 15 May 2008 14:22:43 -0400 Message-ID: <482C7F70.2020102@qumranet.com> Date: Thu, 15 May 2008 21:22:40 +0300 From: Avi Kivity User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Balbir Singh CC: linux-mm@kvack.org, Sudhir Kumar , YAMAMOTO Takashi , Paul Menage , lizf@cn.fujitsu.com, linux-kernel@vger.kernel.org, Pavel Emelianov , Andrew Morton , KAMEZAWA Hiroyuki Subject: Re: [-mm][PATCH 1/4] Add memrlimit controller documentation (v4) References: <20080514130904.24440.23486.sendpatchset@localhost.localdomain> <20080514130915.24440.56106.sendpatchset@localhost.localdomain> In-Reply-To: <20080514130915.24440.56106.sendpatchset@localhost.localdomain> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (firebolt.argo.co.il [0.0.0.0]); Thu, 15 May 2008 21:22:40 +0300 (IDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.