From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758593AbYHUU1D (ORCPT ); Thu, 21 Aug 2008 16:27:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753862AbYHUU0x (ORCPT ); Thu, 21 Aug 2008 16:26:53 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:48487 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753373AbYHUU0w (ORCPT ); Thu, 21 Aug 2008 16:26:52 -0400 Date: Thu, 21 Aug 2008 13:26:42 -0700 From: Andrew Morton To: "Rafael J. Wysocki" Cc: vegard.nossum@gmail.com, linux-kernel@vger.kernel.org, Pekka Enberg Subject: Re: latest -git: suspend: unable to handle kernel paging request (was Re: no_console_suspend doesn't work?) Message-Id: <20080821132642.8208f082.akpm@linux-foundation.org> In-Reply-To: <200808212222.45444.rjw@sisk.pl> References: <19f34abd0808211028w7889587fke523ff244339e7c5@mail.gmail.com> <200808212137.52757.rjw@sisk.pl> <19f34abd0808211308t2ee63a37kc204a5849231af45@mail.gmail.com> <200808212222.45444.rjw@sisk.pl> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 21 Aug 2008 22:22:44 +0200 "Rafael J. Wysocki" wrote: > On Thursday, 21 of August 2008, Vegard Nossum wrote: > > On Thu, Aug 21, 2008 at 9:37 PM, Rafael J. Wysocki wrote: > > > Can you switch to SLAB and retest? I don't really think SLUB is the issue > > > here, but SLAB may give us additional information. > > > > Got this with SLAB: > > Well, it looks like this happened while devices were suspended, but I can't say > what's going wrong. Andrew? Who's the right person to CC? Pekka, I guess. > > BUG: unable to handle kernel NULL pointer dereference at 00000000 > > IP: [] list_del+0xc/0x90 > > *pdpt = 0000000031480001 *pde = 0000000000000000 > > Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > > Pid: 7, comm: events/0 Not tainted (2.6.27-rc4-00003-gef9b1bc #33) > > EIP: 0060:[] EFLAGS: 00010082 CPU: 0 > > EIP is at list_del+0xc/0x90 > > EAX: 00000000 EBX: f556afa0 ECX: f54a5380 EDX: f54e3128 > > ESI: f54f1ef0 EDI: f556afa0 EBP: f68b7ee0 ESP: f68b7ec8 > > DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > > Process events/0 (pid: 7, ti=f68b6000 task=f689c338 task.ti=f68b6000) > > Stack: c015b62e f68b7ed4 c015b66d f68b7efc 00000046 f54f1f20 f68b7f1c c01b4054 > > 00000000 f689c338 f54e315c 00000001 f54f1f20 f54a5380 00000000 f54e3128 > > f55b3348 00000000 f54f1f20 f54f1ef0 00000001 f68b7f3c c01b41ba 00000000 > > Call Trace: > > [] ? get_lock_stats+0x1e/0x50 > > [] ? put_lock_stats+0xd/0x30 > > [] ? free_block+0xa4/0x1b0 > > [] ? drain_array+0x5a/0xb0 > > [] ? cache_reap+0x72/0x230 > > [] ? run_workqueue+0x107/0x200 > > [] ? run_workqueue+0x16a/0x200 > > [] ? run_workqueue+0x107/0x200 > > [] ? cache_reap+0x0/0x230 > > [] ? worker_thread+0x7d/0xe0 > > [] ? autoremove_wake_function+0x0/0x50 > > [] ? worker_thread+0x0/0xe0 > > [] ? kthread+0x42/0x70 > > [] ? kthread+0x0/0x70 > > [] ? kernel_thread_helper+0x7/0x14 > > ======================= > > Code: e8 01 89 44 24 04 e8 d4 1d db ff 8b 55 04 b8 48 2f 7a c0 e8 47 d8 dd ff e8 > > c2 dc d7 ff eb a9 55 89 e5 53 89 c3 83 ec 14 8b 40 04 <8b> 00 39 d8 75 24 8b 13 > > 8b 42 04 39 d8 75 41 8b 43 04 89 42 04 > > EIP: [] list_del+0xc/0x90 SS:ESP 0068:f68b7ec8 But slab hasn't changed in quite some time. I expect something else has reached over and scribbled on it. Bisection time?