Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965803Ab2EOQbQ (ORCPT ); Tue, 15 May 2012 12:31:16 -0400 Received: from e28smtp02.in.ibm.com ([122.248.162.2]:58604 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965661Ab2EOQbO (ORCPT ); Tue, 15 May 2012 12:31:14 -0400 Date: Tue, 15 May 2012 22:00:42 +0530 From: Vaidyanathan Srinivasan To: Vincent Guittot Cc: Peter Zijlstra , paulmck@linux.vnet.ibm.com, 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: <20120515163016.GA4062@dirshya.in.ibm.com> Reply-To: svaidy@linux.vnet.ibm.com References: <1337084609.27020.156.camel@laptop> <1337086834.27020.162.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) x-cbid: 12051516-5816-0000-0000-0000029F228A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1525 Lines: 39 * Vincent Guittot [2012-05-15 17:05:47]: > 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 ? Hi Vincent, In the earlier discussion we listed down the cleanup requirements. I made a cleanup patch that unifies the sysfs interface as a first step. [RFC PATCH v1 0/2] sched: unified sched_powersavings tunables http://thread.gmane.org/gmane.linux.kernel/1239750 I need to make this scheme generically work on different topology, which is the real problem that we need to solve. --Vaidy -- 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/