From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934165Ab3BMPXZ (ORCPT ); Wed, 13 Feb 2013 10:23:25 -0500 Received: from mga14.intel.com ([143.182.124.37]:28035 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934117Ab3BMPXY (ORCPT ); Wed, 13 Feb 2013 10:23:24 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,658,1355126400"; d="scan'208";a="201935263" Message-ID: <511BAFDB.6050908@intel.com> Date: Wed, 13 Feb 2013 23:23:07 +0800 From: Alex Shi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120912 Thunderbird/15.0.1 MIME-Version: 1.0 To: Peter Zijlstra CC: torvalds@linux-foundation.org, mingo@redhat.com, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, bp@alien8.de, pjt@google.com, namhyung@kernel.org, efault@gmx.de, vincent.guittot@linaro.org, gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org Subject: Re: [patch v4 08/18] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" References: <1358996820-23036-1-git-send-email-alex.shi@intel.com> <1358996820-23036-9-git-send-email-alex.shi@intel.com> <1360664874.4485.18.camel@laptop> In-Reply-To: <1360664874.4485.18.camel@laptop> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/12/2013 06:27 PM, Peter Zijlstra wrote: > On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote: >> Remove CONFIG_FAIR_GROUP_SCHED that covers the runnable info, then >> we can use runnable load variables. >> > It would be nice if we could quantify the performance hit of doing so. > Haven't yet looked at later patches to see if we remove anything to > off-set this. > In our rough testing, no much clear performance changes. -- Thanks Alex