From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757139AbZGCPzt (ORCPT ); Fri, 3 Jul 2009 11:55:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757046AbZGCPzl (ORCPT ); Fri, 3 Jul 2009 11:55:41 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:41317 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756957AbZGCPzk (ORCPT ); Fri, 3 Jul 2009 11:55:40 -0400 Message-Id: <20090703152514.903448283@polymtl.ca> User-Agent: quilt/0.46-1 Date: Fri, 03 Jul 2009 11:25:14 -0400 From: Mathieu Desnoyers To: linux-kernel@vger.kernel.org, Venkatesh Pallipadi , Dave Jones , Thomas Renninger , cpufreq@vger.kernel.org, kernel-testers@vger.kernel.org, Ingo Molnar , rjw@sisk.pl, Dave Young , Pekka Enberg Subject: [patch 2.6.30 0/4] Fix cpufreq locking dependency (resend) X-Poly-FromMTA: (test.casi.polymtl.ca [132.207.72.60]) at Fri, 3 Jul 2009 15:55:15 +0000 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (sorry, quilt mail problems in the previous post, here is the resend) Hi, Here is a patchset applying on 2.6.30 which should fix the cpufreq locking dependency. Sadly, my two main test machines does not seem to support cpufreq, so I have only been able to perform very light testing. (I can't afford to lock down my laptop right now). I went for the most straightforward fix I could think of and kept the current locking structure. As you will see, the second patch cleans up the error handling paths of cpufreq add dev, which were a total mess. As a general recommendation, creating scripts which does, concurrently : cpu hotplug up/down cpufreq sysfs actions change between cpufreq governors add governors on random CPU numbers will likely help stress-testing cpufreq locking. I really did not like what I've seen there. It looked _very_ fragile. Hopefully this will be better with this patches, but again, testing is welcome. Thanks, Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68