From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752714AbaDRJjK (ORCPT ); Fri, 18 Apr 2014 05:39:10 -0400 Received: from merlin.infradead.org ([205.233.59.134]:59108 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751736AbaDRJjA (ORCPT ); Fri, 18 Apr 2014 05:39:00 -0400 Date: Fri, 18 Apr 2014 11:38:45 +0200 From: Peter Zijlstra To: Nicolas Pitre Cc: Daniel Lezcano , linux-kernel@vger.kernel.org, mingo@elte.hu, rjw@rjwysocki.net, linux-pm@vger.kernel.org, alex.shi@linaro.org, vincent.guittot@linaro.org, morten.rasmussen@arm.com Subject: Re: [RFC PATCHC 3/3] sched/fair: use the idle state info to choose the idlest cpu Message-ID: <20140418093845.GD11096@twins.programming.kicks-ass.net> References: <1396009796-31598-1-git-send-email-daniel.lezcano@linaro.org> <1396009796-31598-4-git-send-email-daniel.lezcano@linaro.org> <534FDCDC.6000806@linaro.org> <534FFBB3.8050601@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 17, 2014 at 12:21:28PM -0400, Nicolas Pitre wrote: > CPU topology is needed to properly describe scheduling domains. Whether > we balance across domains or pack using as few domains as possible is a > separate issue. In other words, you shouldn't have to care in this > patch series. > > And IMHO coupled C-state is a low-level mechanism that should remain > private to cpuidle which the scheduler shouldn't be aware of. I'm confused.. why wouldn't you want to expose these?