Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756037AbYCPX1t (ORCPT ); Sun, 16 Mar 2008 19:27:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755107AbYCPX0v (ORCPT ); Sun, 16 Mar 2008 19:26:51 -0400 Received: from smtp-out.google.com ([216.239.45.13]:40317 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754885AbYCPX03 (ORCPT ); Sun, 16 Mar 2008 19:26:29 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:to:subject:cc:in-reply-to: mime-version:content-type:content-transfer-encoding: content-disposition:references; b=GkBOjEuG4OXAg4I1EpKJ8SUOMtqrYRa+dTt7DgssoX9lrlAxIZZdimgKyBcCidZBP apK/yHbIG/MGvtnzaUzBw== Message-ID: <6599ad830803161626q1fcf261bta52933bb5e7a6bdd@mail.gmail.com> Date: Mon, 17 Mar 2008 07:26:22 +0800 From: "Paul Menage" To: "Balbir Singh" Subject: Re: [RFC][0/3] Virtual address space control for cgroups Cc: linux-mm@kvack.org, "Hugh Dickins" , "Sudhir Kumar" , "YAMAMOTO Takashi" , lizf@cn.fujitsu.com, linux-kernel@vger.kernel.org, taka@valinux.co.jp, "David Rientjes" , "Pavel Emelianov" , "Andrew Morton" , "KAMEZAWA Hiroyuki" In-Reply-To: <20080316172942.8812.56051.sendpatchset@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080316172942.8812.56051.sendpatchset@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 766 Lines: 16 On Mon, Mar 17, 2008 at 1:29 AM, Balbir Singh wrote: > This is an early patchset for virtual address space control for cgroups. > The patches are against 2.6.25-rc5-mm1 and have been tested on top of > User Mode Linux. What's the performance hit of doing these accounting checks on every mmap/munmap? If it's not totally lost in the noise, couldn't it be made a separate control group, so that it could be just enabled (and the performance hit taken) for users that actually want it? Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/