Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758465Ab2EOPU1 (ORCPT ); Tue, 15 May 2012 11:20:27 -0400 Received: from e39.co.us.ibm.com ([32.97.110.160]:57523 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756421Ab2EOPUZ (ORCPT ); Tue, 15 May 2012 11:20:25 -0400 Date: Tue, 15 May 2012 08:19:58 -0700 From: "Paul E. McKenney" To: Vincent Guittot Cc: Peter Zijlstra , smuckle@quicinc.com, khilman@ti.com, Robin.Randhawa@arm.com, suresh.b.siddha@intel.com, thebigcorporation@gmail.com, venki@google.com, panto@antoniou-consulting.com, mingo@elte.hu, paul.brett@intel.com, pdeschrijver@nvidia.com, pjt@google.com, efault@gmx.de, fweisbec@gmail.com, geoff@infradead.org, rostedt@goodmis.org, tglx@linutronix.de, amit.kucheria@linaro.org, linux-kernel , linaro-sched-sig@lists.linaro.org, Morten Rasmussen , Juri Lelli Subject: Re: Plumbers: Tweaking scheduler policy micro-conf RFP Message-ID: <20120515151958.GD2461@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1337084609.27020.156.camel@laptop> <1337086834.27020.162.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12051515-4242-0000-0000-000001AB62D8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1510 Lines: 37 On Tue, May 15, 2012 at 05:05:47PM +0200, Vincent Guittot wrote: > On 15 May 2012 15:00, Peter Zijlstra wrote: > > On Tue, 2012-05-15 at 14:57 +0200, Vincent Guittot wrote: > >> > >> Not sure that nobody cares but it's much more that scheduler, > >> load_balance and sched_mc are sensible enough that it's difficult to > >> ensure that a modification will not break everything for someone > >> else. > > > > Thing is, its already broken, there's nothing else to break :-) > > sched_mc is the only power-aware knob in the current scheduler. It's > far from being perfect but it seems to work on some ARM platform at > least. You mentioned at the scheduler mini-summit that we need a > cleaner replacement and everybody has agreed on that point. Is anybody > working on it yet ? and can we discuss at Plumber's what this > replacement would look like ? Hello, Vincent, If I understand the patch from a first glance, Peter is doing what everyone agreed to at the scheduler minisummit back in February. >From the notes from that meeting at: https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/HMPscheduling See the line reading "Remove sched_mc. [Peter Zijlstra]". Or am I confused about what Peter's patch does? Thanx, 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/