From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757541AbYEGDIw (ORCPT ); Tue, 6 May 2008 23:08:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752213AbYEGDIl (ORCPT ); Tue, 6 May 2008 23:08:41 -0400 Received: from an-out-0708.google.com ([209.85.132.250]:60731 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751985AbYEGDIi (ORCPT ); Tue, 6 May 2008 23:08:38 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=NbCOmjZPotnQZYVNAUuqeJePXT/skKLDMma/iY39IIrMkuT2q8Kn3F6QaN24oJnNpCuJlJ0cBtKCAGFQXCMlLklYAq6g3YqzFIPj6ifgxEXVrcyQJ/HqVofzIYkve04BDnVRFaFWqMBqdMnLz4P3EMS5vCreKboTs3fQ1WXceq4= Message-ID: Date: Wed, 7 May 2008 03:08:37 +0000 From: "Justin Mattock" To: "Gabriel C" Subject: Re: BIOS bug, APIC version if 0 for CPU#0 Cc: "Rafael J. Wysocki" , "Kasper Sandberg" , "Jacek Luczak" , "Linux Kernel" In-Reply-To: <4821089D.9080901@googlemail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1208872145.14146.103.camel@localhost> <200805070037.12796.rjw@sisk.pl> <4821089D.9080901@googlemail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 7, 2008 at 1:40 AM, Gabriel C wrote: > Rafael J. Wysocki wrote: > > On Tuesday, 22 of April 2008, Justin Mattock wrote: > >> On Tue, Apr 22, 2008 at 1:49 PM, Kasper Sandberg wrote: > >>> On Tue, 2008-04-22 at 06:10 +0000, Justin Mattock wrote: > >>> > On Tue, Apr 22, 2008 at 5:21 AM, Jacek Luczak wrote: > >>> > > Hi, > >>> > > > >>> > > > >>> > > > Hello; > >>> > > > with the latest git on a macbook the system can barely boot without > >>> > > > freezing, a work around for me at leat is either disable smp, or once > >>> > > > booted turn on glxgears,or compiling the kernel i.g. when using the > >>> > > > processors I'm not receiving a freeze, only when everything starts > >>> > > > lowering down. in dmesg I'm noticing BIOS bug, APIC version is 0 for > >>> > > > CPU#0! fixing up to 0x10. (tell you're hw vendor) could this be the > >>> > > > reason for the system freezes?, > >>> > > > >>> > > I don't think so. On my machine there's no freezes with latest git and: > >>> > > ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) > >>> > > BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor) > >>> > > ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) > >>> > > BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor) > >>> > > > >>> > > I've got exactly the same messages. > >>> > > >>> > Are you using a macbook aswell? > >>> > > >>> > > > >>> > > > >>> > > > also I didnt have a camera handy on me > >>> > > > but the screen spit out = Bug spinlock lockup on CPU#0 > >>> > > > swapper/0. c17fa7c0 PID 0, comm: swapper not tainted. > >>> > > > >>> > > Can you try to write down more of those bug messages? > >>> > > >>> > Yeah, > >>> > > >>> > > > >>> > > > >>> > > > I dont have a problem disabling smp, except when I cat /proc/cpuinfo I > >>> > > > don't see anything about my cores. > >>> > > > >>> > > What exactly you expect to see in /proc/cpuinfp while smp is disabled? > >>> > > >>> > under smp I see cpu cores. disabling smp I dont see cpu cores, under > >>> > cat /proc/cpuinfo. > >>> > >>> well.. SMP is kindof support for multiple processors, be it in one > >>> socket, or multiple sockets.. without SMP you will only be able to use 1 > >>> of your X cores. > >> Yeah disabling smp is not a good idea on a macbook pro, performace is horrible. > >> > >>> > > >>> > > >>> > > > >>> > > > >>> > > > I know this is a stupid question > >>> > > > but will it hurt the system if smp is disabled > >>> > > > for the macbook pro ati chipset.? > >>> > > > >>> > > No it won't. > >>> > > > >>> > > -Jacek > >>> > > > >>> > > >>> > Cool as long as the system Is o.k. disabling smp. > >>> It is.. but with the limitations outlined above. > >>> > What about x86: PAT > >>> > support is disabled. how do I enable this option? > >>> > regards; > >>> > > >>> > >>> > >> Thanks for the feedback, well I guess this would be either a > >> regression or a bug. I think the best would be to have somebody else > >> with a macbook pro 15' ati chipset confirm this freezeing as well, > >> before going out and jumping the gun, and filing a bug report. > >> regards; > > > > What's the current status of this issue? > > I reported this issue too but got ignored .. No one of the x86 maintainer did answer my questions. > > http://www.ussg.iu.edu/hypermail/linux/kernel/0805.0/1258.html > > However it does not do any bad on my boxes ( so far I can tell ) is just plain annoying and wrong some who since > is *only* occurs on 32bit kernels. HW is broken or even isn't. > > It seems to me this issue is related to the move of generic_processor_info() and fiends to apic_32.c ( but I'm not really sure ) , > all I'm sure about this message was not in 2.6.25 nor in 2.6.24. > > > > > Rafael > > Regards, > > Gabriel > > Hello; well having something in dmesg give you a BUG signal is a bit worrysome but there is probably a good reason for that there. Probably with all of the other changes going on in the kernel, this would be a temporary solution, until other areas were attended too. who knows; regards; -- Justin P. Mattock