Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030207AbWIES3Y (ORCPT ); Tue, 5 Sep 2006 14:29:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030209AbWIES3Y (ORCPT ); Tue, 5 Sep 2006 14:29:24 -0400 Received: from e32.co.us.ibm.com ([32.97.110.150]:52377 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S1030207AbWIES3X (ORCPT ); Tue, 5 Sep 2006 14:29:23 -0400 Message-ID: <44FDC1E1.7090006@in.ibm.com> Date: Tue, 05 Sep 2006 23:58:49 +0530 From: Balbir Singh Reply-To: balbir@in.ibm.com Organization: IBM India Private Limited User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.6) Gecko/20060730 SeaMonkey/1.0.4 MIME-Version: 1.0 To: Dave Hansen Cc: Kirill Korotaev , Andrew Morton , Linux Kernel Mailing List , Alan Cox , Christoph Hellwig , Pavel Emelianov , Andrey Savochkin , devel@openvz.org, Rik van Riel , Andi Kleen , Oleg Nesterov , Alexey Dobriyan , Matt Helsley , CKRM-Tech , Hugh Dickins Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) References: <44FD918A.7050501@sw.ru> <1157478392.3186.26.camel@localhost.localdomain> In-Reply-To: <1157478392.3186.26.camel@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1901 Lines: 51 Dave Hansen wrote: > On Tue, 2006-09-05 at 19:02 +0400, Kirill Korotaev wrote: >> Core Resource Beancounters (BC) + kernel/user memory control. >> >> BC allows to account and control consumption >> of kernel resources used by group of processes. > > Hi Kirill, > > I've honestly lost track of these discussions along the way, so I hope > you don't mind summarizing a bit. > > Do these patches help with accounting for anything other than memory? > Will we need new user/kernel interfaces for cpu, i/o bandwidth, etc...? > > Have you given any thought to the possibility that a task might need to > move between accounting contexts? That has certainly been a > "requirement" pushed on to CKRM for a long time, and the need goes > something like this: > > 1. A system runs a web server, which services several virtual domains > 2. that web server receives a request for foo.com > 3. the web server switches into foo.com's accounting context > 4. the web server reads things from disk, allocates some memory, and > makes a database request. > 5. the database receives the request, and switches into foo.com's > accounting context, and charges foo.com for its resource use > etc... > > So, the goal is to run _one_ copy of an application on a system, but > account for its resources in a much more fine-grained way than at the > application level. > > I think we can probably use beancounters for this, if we do not worry > about migrating _existing_ charges when we change accounting context. > Does that make sense? > > -- Dave This is much better stated than I did. Thanks! -- Balbir Singh, Linux Technology Center, IBM Software Labs - 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/