From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934166AbYEFWrO (ORCPT ); Tue, 6 May 2008 18:47:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762929AbYEFWq4 (ORCPT ); Tue, 6 May 2008 18:46:56 -0400 Received: from wx-out-0506.google.com ([66.249.82.224]:3231 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761033AbYEFWqz (ORCPT ); Tue, 6 May 2008 18:46:55 -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=LZntxbMXejzl2MUxtypuRuHL2rYhtaWunSOZQ0PWQe0jUE/AZbZf38EldFqq4fwW4WphvBp/KdkKpQGvnBrTkxKIxgkl7EDqg1Dh8vY3urWxV0VfrW+IcIXdqQ+ow6BImugbd2sW2k6cflDo4YjvXOGlBR98qFY6w0VYfQYJQ7M= Message-ID: Date: Tue, 6 May 2008 22:46:51 +0000 From: "Justin Mattock" To: "Rafael J. Wysocki" Subject: Re: BIOS bug, APIC version if 0 for CPU#0 Cc: "Kasper Sandberg" , "Jacek Luczak" , "Linux Kernel" In-Reply-To: <200805070037.12796.rjw@sisk.pl> 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 6, 2008 at 10:37 PM, 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? > > Rafael > Right now I loaded 2.6.26-rc1 and everything seems to be O.K., The freezing was resolved With a patch from peter Zijlstra I think it was called idle-lockdep-1.patch. From what I can remember this patch was put upstream. regards; -- Justin P. Mattock