From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755631Ab0IIVCz (ORCPT ); Thu, 9 Sep 2010 17:02:55 -0400 Received: from terminus.zytor.com ([198.137.202.10]:60944 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753455Ab0IIVCx (ORCPT ); Thu, 9 Sep 2010 17:02:53 -0400 Message-ID: <4C894AE8.1010705@zytor.com> Date: Thu, 09 Sep 2010 14:00:24 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.8) Gecko/20100806 Fedora/3.1.2-1.fc13 Thunderbird/3.1.2 MIME-Version: 1.0 To: =?UTF-8?B?VG9tw6HFoSBKYW5vdcWhZWs=?= CC: Greg KH , Jeremy Fitzhardinge , mingo@redhat.com, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, glommer@redhat.com, alan@lxorguk.ukuu.org.uk, zamsden@redhat.com, stable@kernel.org, mtosatti@redhat.com, gregkh@suse.de, peter@palfrader.org, tglx@linutronix.de, avi@redhat.com, linux-tip-commits@vger.kernel.org Subject: Re: [stable] [tip:x86/urgent] x86: Add memory modify constraints to xchg() and cmpxchg() References: <4C4F7277.8050306@zytor.com> <4C5759FF.1000807@goop.org> <20100802235950.GA662@kroah.com> <20100909195301.GA18291@nomi.cz> In-Reply-To: <20100909195301.GA18291@nomi.cz> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/09/2010 12:53 PM, Tomáš Janoušek wrote: > Hello, > > 2.6.32.21 does not boot on my HP Compaq nx7300. I bisected it to this patch: > > On Mon, Aug 02, 2010 at 04:59:50PM -0700, Greg KH wrote: >> On Mon, Aug 02, 2010 at 04:51:27PM -0700, Jeremy Fitzhardinge wrote: >>> On 07/27/2010 10:33 PM, tip-bot for H. Peter Anvin wrote: >>>> Commit-ID: 113fc5a6e8c2288619ff7e8187a6f556b7e0d372 >>>> Gitweb: http://git.kernel.org/tip/113fc5a6e8c2288619ff7e8187a6f556b7e0d372 >>>> Author: H. Peter Anvin >>>> AuthorDate: Tue, 27 Jul 2010 17:01:49 -0700 >>>> Committer: H. Peter Anvin >>>> CommitDate: Tue, 27 Jul 2010 17:14:02 -0700 >>>> >>>> x86: Add memory modify constraints to xchg() and cmpxchg() >>> >>> Here's the 2.6.32 version for stable. >> >> Thanks, I'll queue it up when it hits Linus's tree. > > Here's a video of the crash: http://store.lisk.in/tmp/09092010019.mp4 > With boot_delay=30, it sometimes just reboots and sometimes prints the trace. > Without it, it always prints the trace. The crash occurs during the > initialization of intel-agp (which explains why I can't reproduce it in qemu). > More details in the video. > > The system boots and works just fine with 2.6.32.21 with the patch reverted. > v2.6.36-rc3-185-gd56557a works fine as well, perhaps there were other fixes > that didn't get to stable (e.g. 4532b30). > > I'm compiling the kernel with the latest gcc in Debian (-dumpversion says > 4.4.5, dpkg reports 4:4.4.4-2). Shall I post dmesg/lspci as well? > > Since I have an easy workaround and other things to do, I won't spend time > trying to backport those other fixes myself, but if you're going to fix this, > I will help with testing. > Could you give us your .config and also what version of gcc and binutils is on your system? -hpa