From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933853AbaCSMB6 (ORCPT ); Wed, 19 Mar 2014 08:01:58 -0400 Received: from merlin.infradead.org ([205.233.59.134]:58910 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933380AbaCSMB4 (ORCPT ); Wed, 19 Mar 2014 08:01:56 -0400 Date: Wed, 19 Mar 2014 13:01:22 +0100 From: Peter Zijlstra To: Vincent Guittot Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com, preeti@linux.vnet.ibm.com, tony.luck@intel.com, fenghua.yu@intel.com, schwidefsky@de.ibm.com, james.hogan@imgtec.com, cmetcalf@tilera.com, benh@kernel.crashing.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org Subject: Re: [PATCH v2 5/7] sched: add a new SD_SHARE_POWERDOMAIN for sched_domain Message-ID: <20140319120122.GK27632@laptop.programming.kicks-ass.net> References: <1395165409-18055-1-git-send-email-vincent.guittot@linaro.org> <1395165409-18055-6-git-send-email-vincent.guittot@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1395165409-18055-6-git-send-email-vincent.guittot@linaro.org> 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 Tue, Mar 18, 2014 at 06:56:47PM +0100, Vincent Guittot wrote: > A new flag SD_SHARE_POWERDOMAIN is created to reflect whether groups of CPUs > in a sched_domain level can or not reach different power state. As an example, > the flag should be cleared at CPU level if groups of cores can be power gated > independently. This information can be used to add load balancing level between > group of CPUs than can power gate independantly. The default behavior of the > scheduler is to spread tasks across CPUs and groups of CPUs > so the flag is set into all sched_domains. I suppose that is the part Preeti stumbled over; as did I. Its not set at all.