From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754489AbZHJNcI (ORCPT ); Mon, 10 Aug 2009 09:32:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754337AbZHJNcH (ORCPT ); Mon, 10 Aug 2009 09:32:07 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57501 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754319AbZHJNcH (ORCPT ); Mon, 10 Aug 2009 09:32:07 -0400 Date: Mon, 10 Aug 2009 15:29:23 +0200 From: Ingo Molnar To: Johannes Stezenbach Cc: Andi Kleen , x86@kernel.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" Subject: Re: 2.6.31-rc5 regression: x86 MCE malfunction on Thinkpad T42p Message-ID: <20090810132923.GA4418@elte.hu> References: <20090807170942.GB9177@sig21.net> <87k51cgdt8.fsf@basil.nowhere.org> <20090810122731.GA5863@sig21.net> <20090810123228.GD6838@basil.fritz.box> <20090810125651.GB6082@sig21.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090810125651.GB6082@sig21.net> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Johannes Stezenbach wrote: > On Mon, Aug 10, 2009 at 02:32:28PM +0200, Andi Kleen wrote: > > > > The appended patch should remove the warning. Can you please test it? > > > > > > It works (no more warning), but I feel I'm better off using "lapic" > > > > Thanks for testing. > > > > > because it enables thermal monitoring and performance counters. > > > > When the BIOS doesn't enable it then force enabling lapic might not work. > > > > This could cause either boot failures (obvious) or more subtle > > problems like SMM doing something unexpected. Just saying that > > if you have strange problems later first try disabling this > > option again. > > Thanks for the heads-up. I remember I tried to use oprofile in > the past on this machine and was disappointed that it only got the > timer event. I'll keep lapic for now unless I see signs of > instability. What's the output of something like 'perf stat true', and does 'perf top' output something - i.e. do perfcounters work in general? Once you get to that stage and it works then it should be fine. Ingo