Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758038AbYG1QnU (ORCPT ); Mon, 28 Jul 2008 12:43:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756007AbYG1QnG (ORCPT ); Mon, 28 Jul 2008 12:43:06 -0400 Received: from zcars04f.nortel.com ([47.129.242.57]:43379 "EHLO zcars04f.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754810AbYG1QnE (ORCPT ); Mon, 28 Jul 2008 12:43:04 -0400 Message-ID: <488DF70E.20404@nortel.com> Date: Mon, 28 Jul 2008 10:42:54 -0600 From: "Chris Friesen" User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: luis6674@yahoo.com CC: linux-kernel@vger.kernel.org Subject: Re: How to disable group scheduler correctly? References: <842240.12654.qm@web53310.mail.re2.yahoo.com> In-Reply-To: <842240.12654.qm@web53310.mail.re2.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 28 Jul 2008 16:42:58.0565 (UTC) FILETIME=[FE04CB50:01C8F0D0] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 971 Lines: 24 Alberto Gonzalez wrote: > [1] For example, in Arch Linux the group scheduler was first enabled > in 2.6.25, but due to latency issues it was quickly disabled. But > after that, the following report claims to have problems with > everything *GROUP* disabled and that you need to enable CGROUPS to > solve them (the report links to similar reports on Gentoo and Ubuntu, > so it seems the confusion is quite general): > > http://bugs.archlinux.org/task/10512 The linked thread talks about latency problems in the CFQ I/O scheduler, not the process scheduler. It appears that enabling CGROUPS helps get around the I/O scheduler issues. Are you sure that you actually want to disable group scheduling for processes? Chris -- 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/