From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756054Ab1ALJ0e (ORCPT ); Wed, 12 Jan 2011 04:26:34 -0500 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:58661 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756011Ab1ALJ02 (ORCPT ); Wed, 12 Jan 2011 04:26:28 -0500 Date: Wed, 12 Jan 2011 14:56:24 +0530 From: Bharata B Rao To: Mike Galbraith Cc: Yong Zhang , Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [patch] Re: autogroup: sched_setscheduler() fails Message-ID: <20110112092624.GH2723@in.ibm.com> Reply-To: bharata@linux.vnet.ibm.com References: <1294657154.2016.459.camel@laptop> <1294677746.8345.4.camel@marge.simson.net> <20110111171046.GL4772@in.ibm.com> <1294771686.8006.15.camel@marge.simson.net> <20110112033709.GA2723@in.ibm.com> <20110112063543.GD2723@in.ibm.com> <1294817081.8370.60.camel@marge.simson.net> <20110112080620.GG2723@in.ibm.com> <1294822039.8370.97.camel@marge.simson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1294822039.8370.97.camel@marge.simson.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 12, 2011 at 09:47:19AM +0100, Mike Galbraith wrote: > On Wed, 2011-01-12 at 13:36 +0530, Bharata B Rao wrote: > > On Wed, Jan 12, 2011 at 08:24:41AM +0100, Mike Galbraith wrote: > > > > Yes, it's supposed to be transparent to cgroups. > > > > If cgroups doesn't want that task and if its transparent to cgroups, > > why is it shown as part of /cgroups/tasks ? The task really doesn't > > belong in there. Its not on the runqueue of root_task_group. > > > > So basically I feel that a task consumed by autogroup shouldn't ideally be > > shown in root cgroup's tasks file. > > >From cgroups' viewpoint, root is where it's at. The task isn't consumed > by autogroup either, it's only borrowed until cgroups claims it. > > Would you prefer that when you mount /cgroups, you see a nearly empty > root task list because box was booted with autogroup enabled? If I had my way, I would say yes :) I would even say make autogroups visible so that we know exactly what it is. Let 'auto' in autogroups mean only 'automatic' and not necessarily 'hidden'. > Should > tasks appear and disappear on the fly while you're watching? Why would they unless we explicitly move them ? Anyway I guess you would have gone through these questions already. Thanks for patiently answering :) Regards, Bharata.