From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755369Ab2AIONO (ORCPT ); Mon, 9 Jan 2012 09:13:14 -0500 Received: from mga02.intel.com ([134.134.136.20]:45259 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755116Ab2AIONL (ORCPT ); Mon, 9 Jan 2012 09:13:11 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,351,1309762800"; d="scan'208";a="96084105" Message-ID: <4F0AF5F5.9080403@linux.intel.com> Date: Mon, 09 Jan 2012 06:13:09 -0800 From: Arjan van de Ven User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: Peter Zijlstra CC: Youquan Song , linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, akpm@linux-foundation.org, stable@vger.kernel.org, suresh.b.siddha@intel.com, len.brown@intel.com, anhua.xu@intel.com, chaohong.guo@intel.com, Youquan Song , Paul Turner Subject: Re: [PATCH] x86,sched: Fix sched_smt_power_savings totally broken References: <1326099367-4166-1-git-send-email-youquan.song@intel.com> <1326103578.2442.50.camel@twins> <1326104915.2442.53.camel@twins> In-Reply-To: <1326104915.2442.53.camel@twins> X-Enigmail-Version: 1.3.4 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/9/2012 2:28 AM, Peter Zijlstra wrote: > On Mon, 2012-01-09 at 11:06 +0100, Peter Zijlstra wrote: >> I'm >< close to committing a patch removing all the power_saving >> magic from the scheduler. > > Unless someone steps up that says they care about this crap and are > willing to clean it up this goes in... > there is one legitimate choice to make in the scheduler, which is a real honest preference: the spread out versus "sort left" preference. that doesn't need 15 knobs, that needs one. I can totally buy that this might be easiest done by ripping out all existing stuff, and then doing something relatively simple (say, in the, "which CPU to run at" logic, a minor bias)