From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753921AbZBQSRR (ORCPT ); Tue, 17 Feb 2009 13:17:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751810AbZBQSRE (ORCPT ); Tue, 17 Feb 2009 13:17:04 -0500 Received: from smtp-12.star.net.uk ([212.125.75.81]:34040 "HELO smtp-12.star.net.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751535AbZBQSRB (ORCPT ); Tue, 17 Feb 2009 13:17:01 -0500 Date: Tue, 17 Feb 2009 18:15:17 +0000 From: Bob Wilkinson To: Arjan van de Ven Cc: linux-kernel@vger.kernel.org Subject: Re: [PROBLEM] Multiple BUG: unable to handle kernel paging request Message-ID: <20090217181517.GA828@fourtheye.org> References: <20090216211012.GA31416@fourtheye.org> <20090216134129.6f9e7458@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090216134129.6f9e7458@infradead.org> X-Operating-System: Linux spain 2.6.26-1-sparc64 X-Debian-Version: 5.0 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 16, 2009 at 01:41:29PM -0800, Arjan van de Ven wrote: > On Mon, 16 Feb 2009 21:10:12 +0000 > Bob Wilkinson wrote: > > > Hello > > > > I have been having many problems with the stability of one of > > my machines. It does have a lot of attached peripherals, and > > regularly crashes. It does not always boot. I have attached as much > > information as I know to. > > > > There are multiple > > > > BUG: unable to handle kernel paging request > > you're using a rather old kernel; it might be better to report such an > issue to your distribution instead. > > > however, one thing to try is to put "mem=750M" on the kernel command > line; if your bios lies to you about how much memory you have that > would work around it. Hi Arjan Thanks for your suggestion. I added this to the end of the boot line in grub.conf. I needed to restart again today and saw this in the kern.log. Feb 17 09:21:57 italy kernel: [ 0.114545] ACPI: Core revision 20080321 Feb 17 09:21:57 italy kernel: [ 0.123946] ACPI: setting ELCR to 0200 (from 0e00) Feb 17 09:21:57 italy kernel: [ 0.128008] weird, boot CPU (#0) not listedby the BIOS. Feb 17 09:21:57 italy kernel: [ 0.128008] SMP motherboard not detected. Feb 17 09:21:57 italy kernel: [ 0.128008] Local APIC not detected. Using dummy APIC emulation. Feb 17 09:21:57 italy kernel: [ 0.128008] SMP disabled Feb 17 09:21:57 italy kernel: [ 0.128008] Brought up 1 CPUs Feb 17 09:21:57 italy kernel: [ 0.128070] Total of 1 processors activated (1863.87 BogoMIPS). I do find it weird that the BIOS does not list the one - and only - CPU. I will build a newer kernel from source and see how I get on with that. I do suspect that I have some combination of intermittently faulty hardware. I quite often have a locked up machine - sometimes with three keyboard lights flashing, sometimes responding to CTRL-ALT-SYSRQ commands - sometimes not... > Arjan van de Ven Intel Open Source Technology Centre > For development, discussion and tips for power savings, > visit http://www.lesswatts.org Bob