Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761436AbXIUTeV (ORCPT ); Fri, 21 Sep 2007 15:34:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761480AbXIUTeE (ORCPT ); Fri, 21 Sep 2007 15:34:04 -0400 Received: from turing-police.cc.vt.edu ([128.173.14.107]:60961 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761018AbXIUTeD (ORCPT ); Fri, 21 Sep 2007 15:34:03 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Jiri Slaby Cc: Matt Mackall , Dave Airlie , Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1] In-Reply-To: Your message of "Fri, 21 Sep 2007 19:30:04 +0200." <46F3FF9C.7040200@gmail.com> From: Valdis.Kletnieks@vt.edu References: <20070918011841.2381bd93.akpm@linux-foundation.org> <46F10B69.5070008@gmail.com> <46F10DCB.1090302@gmail.com> <46F13938.1070709@gmail.com> <20070919121017.0cbcbc30.akpm@linux-foundation.org> <20070919192453.GB18707@one.firstfloor.org> <21d7e9970709191842h3111390cl8f09745bed6bd8f9@mail.gmail.com> <20070920220604.GA17536@waste.org> <10207.1190394975@turing-police.cc.vt.edu> <46F3FF9C.7040200@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1190403228_2846P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 21 Sep 2007 15:33:48 -0400 Message-ID: <4109.1190403228@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1963 Lines: 49 --==_Exmh_1190403228_2846P Content-Type: text/plain; charset=us-ascii On Fri, 21 Sep 2007 19:30:04 +0200, Jiri Slaby said: > On 09/21/2007 07:16 PM, Valdis.Kletnieks@vt.edu wrote: > > Hmm.. maybe I'm chasing a different bug manifested by the same patch. For me, > > it's been a solid lockup at X startup since -rc3-mm1, and this patch doesn't > > change matters. > > This patch probably changes behaviour how the pages are queued on the list > somehow. Maybe it's insane to suggest everybody with similar problem to try > LIST_DEBUG, but just give it a try after having one of the patches applied ;). > (Or have you tried yet?) OK, had a chance to test it, with Dave Airlie's AGP patch, and here's what it hit: [ 198.925000] list_del corruption. next->prev should be ffff81000118f178, but was ffffffff8067e050 [ 198.925000] ------------[ cut here ]------------ [ 198.925000] kernel BUG at lib/list_debug.c:72! [ 198.925000] invalid opcode: 0000 [1] PREEMPT SMP [ 198.925000] last sysfs file: /devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-adapter/i2c-1/i2c-1/dev [ 198.925000] CPU 1 [ 198.925000] Modules linked in: (Yes, I wish I got a backtrace, but that's as long as it lived. Apparently, the netconsole stuff actually writing this stuff out was over on CPU0 which then proceeded to croak). Some odd SMP-related race? (x86_64 kernel on a Core2 Duo T7200, if it matters) --==_Exmh_1190403228_2846P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFG9ByccC3lWbTT17ARAr4TAKDWL1bY5VbJpuMCLAEmO9m6Txvm8wCgktZJ NLNmhiX75p50s21vEYX0gM4= =0L+r -----END PGP SIGNATURE----- --==_Exmh_1190403228_2846P-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/