From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932156AbWGQHzT (ORCPT ); Mon, 17 Jul 2006 03:55:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932350AbWGQHzT (ORCPT ); Mon, 17 Jul 2006 03:55:19 -0400 Received: from ug-out-1314.google.com ([66.249.92.171]:177 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S932156AbWGQHzS (ORCPT ); Mon, 17 Jul 2006 03:55:18 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=WhsEA0sCDoMxWxs99nsoHHU4vhpXAxC/P1RIjh3YiRS0suh/FhvoEUU9/AKmbt1d+NdO9BTmm3ZGxWiXQSDcpHUF8dsMK1Yh3vxmdcyNGENr8Ds7EPESq7f3LofK2PgYM1XA/csiAZAIChkAxV2tgJoj4Gkje84CBQRhiCNl4Yo= Message-ID: Date: Mon, 17 Jul 2006 00:55:16 -0700 From: "Vikas Kedia" To: "Andreas Mohr" Subject: Re: kernel panic at load average of 24 is it acceptable ? Cc: linux-kernel@vger.kernel.org In-Reply-To: <20060717072457.GA12215@rhlx01.fht-esslingen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060717072457.GA12215@rhlx01.fht-esslingen.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Read up on MCE debugging methods on Linux or so, that should hopefully help. Here is the output of mcelog: root@srv1:~# less /var/log/mcelog MCE 0 CPU 0 0 data cache TSC 6988ae18046 ADDR f87f5ec0 Data cache ECC error (syndrome ce) bit46 = corrected ecc error bus error 'local node origin, request didn't time out data read mem transaction memory access, level generic' STATUS 9467400000000833 MCGSTATUS 0 MCE 0 CPU 0 0 data cache TSC 723b38a3633 ADDR 3d9fc0 Data cache ECC error (syndrome ce) bit46 = corrected ecc error bit62 = error overflow (multiple errors) bus error 'local node origin, request didn't time out data read mem transaction memory access, level generic' STATUS d467400000000833 MCGSTATUS 0 Since it shows ECC error is the hypothesis correct that its the RAM problem and replacing it should solve the problem. Regards, Vikas On 7/17/06, Andreas Mohr wrote: > Hi, > > On Mon, Jul 17, 2006 at 12:08:41AM -0700, Vikas Kedia wrote: > > The memtest ran fine for 8 hours: > > http://www.visitlab.com/styles/basic/images/memtest.JPG > > > > My questions are: > > 1. Kernel panic at load average of 24 is it acceptable ? > > Kernel panic is _NEVER_ acceptable. > I've seen loads in the couple hundreds with no problem. > > However you actually have a mce_panic() crash here. > Make sure to figure out why this Machine Check Exception got raised, > otherwise you might hose the box if you continue without investigation. > It could easily be due to mal-working CPU fan etc.pp., especially since it > happened exactly while you stress-tested the machine. > > > 2. If not how do I go about debugging this kernel panic ? > > Read up on MCE debugging methods on Linux or so, that should hopefully help. > > Good luck! > > Andreas Mohr >