Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965228AbWIERrF (ORCPT ); Tue, 5 Sep 2006 13:47:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965229AbWIERrF (ORCPT ); Tue, 5 Sep 2006 13:47:05 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:45962 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S965228AbWIERrB (ORCPT ); Tue, 5 Sep 2006 13:47:01 -0400 Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) From: Dave Hansen To: Kirill Korotaev Cc: 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 In-Reply-To: <44FD918A.7050501@sw.ru> References: <44FD918A.7050501@sw.ru> Content-Type: text/plain Date: Tue, 05 Sep 2006 10:46:32 -0700 Message-Id: <1157478392.3186.26.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1700 Lines: 43 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 - 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/