Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932639Ab2KEOyL (ORCPT ); Mon, 5 Nov 2012 09:54:11 -0500 Received: from exprod7og123.obsmtp.com ([64.18.2.24]:47079 "EHLO exprod7og123.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932503Ab2KEOyJ (ORCPT ); Mon, 5 Nov 2012 09:54:09 -0500 Message-ID: <5097D30A.1030607@genband.com> Date: Mon, 05 Nov 2012 08:54:02 -0600 From: Chris Friesen User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Lightning/1.0b3pre Thunderbird/3.1.16 MIME-Version: 1.0 To: Michal Zatloukal CC: linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org Subject: Re: Fwd: Nice processes prevent frequency increases - possible scheduler regression (known good in 2.6.35) References: <1351942405.16850.23.camel@maggy.simpson.net> <1351943332.16850.25.camel@maggy.simpson.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 05 Nov 2012 14:54:03.0646 (UTC) FILETIME=[65BB09E0:01CDBB65] X-TM-AS-Product-Ver: SMEX-8.0.0.4160-6.500.1024-19340.007 X-TM-AS-Result: No--8.465400-8.000000-31 X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1055 Lines: 25 On 11/03/2012 09:40 AM, Michal Zatloukal wrote: > On Sat, Nov 3, 2012 at 12:48 PM, Mike Galbraith wrote: >> On Sat, 2012-11-03 at 04:33 -0700, Mike Galbraith wrote: >>> On Fri, 2012-11-02 at 21:09 +0100, Michal Zatloukal wrote: >>> Your nice 19 tasks receiving 'too much' CPU when there are other >>> runnable tasks around sounds like you have SCHED_AUTOGROUP enabled. >> >> (forgot to mention: if that's the case, you can add noautogroup to your >> kernel command line to turn it off if distro turned it on in .config) >> > > Thanks, Ubuntu's kernel is indeed configured with that option enabled, > and passing "noautogroup" at grub restores the previous behaviour. I'm > back to happy days again :) BTW, isn't this the "magic 200-line patch" > I was reading about ~2 years ago? Yes. Chris -- 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/