From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750701AbWBIWkm (ORCPT ); Thu, 9 Feb 2006 17:40:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750708AbWBIWkm (ORCPT ); Thu, 9 Feb 2006 17:40:42 -0500 Received: from btr0x1.rz.uni-bayreuth.de ([132.180.8.29]:53228 "EHLO btr0x1.rz.uni-bayreuth.de") by vger.kernel.org with ESMTP id S1750701AbWBIWkl (ORCPT ); Thu, 9 Feb 2006 17:40:41 -0500 From: Andreas Herrmann To: linux-kernel@vger.kernel.org Subject: Probably a BUG: kswapd0[116] exited with preempt_count 1 Date: Thu, 9 Feb 2006 23:40:36 +0100 User-Agent: KMail/1.8.3 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200602092340.36427.andreas.herrmann@uni-bayreuth.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I got probably a kernel bug on my servers. I'm using following kernel: Linux mrpink 2.6.15 #2 PREEMPT Tue Jan 3 15:03:06 CET 2006 i686 Pentium II (Deschutes) GenuineIntel GNU/Linux After an uptime of about 33 days the server, only used for Heimdal kerberos and OpenLDAP, crashed partly and I found this error log: Feb 6 07:16:37 mrpink Unable to handle kernel NULL pointer dereference at virtual address 00000010 Feb 6 07:16:37 mrpink printing eip: Feb 6 07:16:37 mrpink c0132830 Feb 6 07:16:37 mrpink *pde = 00000000 Feb 6 07:16:37 mrpink Oops: 0000 [#1] Feb 6 07:16:37 mrpink PREEMPT Feb 6 07:16:37 mrpink Modules linked in: Feb 6 07:16:37 mrpink CPU: 0 Feb 6 07:16:37 mrpink EIP: 0060:[] Not tainted VLI Feb 6 07:16:37 mrpink EFLAGS: 00010093 (2.6.15) Feb 6 07:16:37 mrpink EIP is at find_get_pages+0x35/0x61 Feb 6 07:16:37 mrpink eax: 8000082c ebx: 00000004 ecx: 00000001 edx: 00000010 Feb 6 07:16:37 mrpink esi: cfcd9e48 edi: cfcd8000 ebp: 00000000 esp: cfcd9e0c Feb 6 07:16:37 mrpink ds: 007b es: 007b ss: 0068 Feb 6 07:16:37 mrpink Process kswapd0 (pid: 116, threadinfo=cfcd8000 task=cfcd1a70) Feb 6 07:16:37 mrpink Stack: cfcd9e40 00000000 c013ad82 c2dc4770 00000000 0000000e cfcd9e48 c2dc46d0 Feb 6 07:16:37 mrpink c013b100 cfcd9e40 c2dc4770 00000000 0000000e 00000000 00000000 c1159ee0 Feb 6 07:16:37 mrpink 00000010 00000010 00000010 c4d36b88 c011b678 c01044c6 c0102fca c4d36b88 Feb 6 07:16:37 mrpink Call Trace: Feb 6 07:16:37 mrpink [] pagevec_lookup+0x1a/0x21 Feb 6 07:16:37 mrpink [] invalidate_mapping_pages+0x9c/0xb1 Feb 6 07:16:37 mrpink [] irq_exit+0x29/0x34 Feb 6 07:16:37 mrpink [] do_IRQ+0x1e/0x24 Feb 6 07:16:37 mrpink [] common_interrupt+0x1a/0x20 Feb 6 07:16:37 mrpink [] invalidate_inode_pages+0xd/0x11 Feb 6 07:16:37 mrpink [] prune_icache+0xdb/0x193 Feb 6 07:16:37 mrpink [] shrink_icache_memory+0x18/0x30 Feb 6 07:16:37 mrpink [] shrink_slab+0x13c/0x197 Feb 6 07:16:37 mrpink [] balance_pgdat+0x216/0x347 Feb 6 07:16:37 mrpink [] kswapd+0xed/0xf2 Feb 6 07:16:37 mrpink [] autoremove_wake_function+0x0/0x3a Feb 6 07:16:37 mrpink [] ret_from_fork+0x6/0x14 Feb 6 07:16:37 mrpink [] autoremove_wake_function+0x0/0x3a Feb 6 07:16:37 mrpink [] kswapd+0x0/0xf2 Feb 6 07:16:37 mrpink [] kernel_thread_helper+0x5/0xb Feb 6 07:16:37 mrpink Code: ff ff 21 e0 ff 40 14 ff 74 24 14 ff 74 24 14 56 8b 44 24 18 83 c0 04 50 e8 b8 1c 0b 00 89 c3 31 c9 83 c4 10 39 d9 73 13 8b 14 8e <8b> 02 f6 c4 40 74 03 8b 52 0c ff 42 04 41 eb e9 fb b8 00 e0 ff Feb 6 07:16:37 mrpink <6>note: kswapd0[116] exited with preempt_count 1 If you need more information feel free to ask. But for first steps it should be enough. Andi