From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757032Ab0BXNZe (ORCPT ); Wed, 24 Feb 2010 08:25:34 -0500 Received: from mail-yw0-f197.google.com ([209.85.211.197]:33793 "EHLO mail-yw0-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756973Ab0BXNZc (ORCPT ); Wed, 24 Feb 2010 08:25:32 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=JJL9ugTD2yYJbduV6szqftA/B32j+1/UwXafxDrldVPWlH9EcEXdxoeY+8ChPvlLTX B1g0WGxFjFGRM7iNoEbaUUWzODlQaoSX8eBGHkRWXkV0xOtsatxRiD5PNjfwM/4GEIqq i5HhC0UG77+1Nyoa8Yf3FTyJIbhf6kaf/fTLU= MIME-Version: 1.0 Date: Wed, 24 Feb 2010 14:25:31 +0100 Message-ID: Subject: kernel bug? From: "saraguato@gmail.com" To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I am totally stumped as to whom to send the report, so i sent to this address Problem: System crash. Some proccess are freezes, some proccess continue ok. I have to force a hardware reboot. Keyworkds: kernel, nfs Kernel version: Ubuntu 9.04 jaunty, kernel version:Linux la16-cgen-dev 2.6.28-18-generic #59-Ubuntu SMP Thu Jan 28 01:23:03 UTC 2010 i686 GNU/Linux Descripcion: I launched a program during all the night.This program share a loop device with network block devices. This loop device is assigned to a file located in a nfs directory. The program is a server which share and unshare continually, the client work on shared network block device when it is shared. At 7:41 on morning, cron launch some proccess and my server program is freezed. A part of the syslog: Feb 24 07:39:21 la16-cgen-dev nbd_server[23072]: Disconnect request received. Feb 24 07:39:21 la16-cgen-dev nbd_server[23035]: Child exited with 0 Feb 24 07:39:45 la16-cgen-dev nbd_server[23242]: connect from 127.0.0.1, assigned file is /dev/loop0 Feb 24 07:39:45 la16-cgen-dev nbd_server[23242]: Can't open authorization file /etc/nbd-server/allow (No such file or directory). Feb 24 07:39:45 la16-cgen-dev nbd_server[23242]: Authorized client Feb 24 07:39:45 la16-cgen-dev nbd_server[23277]: Starting to serve Feb 24 07:39:45 la16-cgen-dev nbd_server[23277]: Size of exported file/device is 209715200 [The above pattern is repeated all night. Now comes the problem when cron launch some program] Feb 24 07:40:01 la16-cgen-dev /USR/SBIN/CRON[23285]: (root) CMD ([ -x /usr/sbin/update-motd ] && /usr/sbin/update-motd 2>/dev/null) Feb 24 07:40:31 la16-cgen-dev nbd_server[23277]: Disconnect request received. Feb 24 07:40:31 la16-cgen-dev nbd_server[23242]: Child exited with 0 Feb 24 07:40:56 la16-cgen-dev nbd_server[23576]: connect from 127.0.0.1, assigned file is /dev/loop0 Feb 24 07:40:56 la16-cgen-dev nbd_server[23576]: Can't open authorization file /etc/nbd-server/allow (No such file or directory). Feb 24 07:40:56 la16-cgen-dev nbd_server[23576]: Authorized client Feb 24 07:40:56 la16-cgen-dev nbd_server[23611]: Starting to serve Feb 24 07:40:56 la16-cgen-dev nbd_server[23611]: Size of exported file/device is 209715200 Feb 24 07:41:42 la16-cgen-dev nbd_server[23611]: Disconnect request received. Feb 24 07:41:42 la16-cgen-dev nbd_server[23576]: Child exited with 0 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.558463] ------------[ cut here ]------------ Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.558733] kernel BUG at /build/buildd/linux-2.6.28/fs/nfs/write.c:252! Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.558805] invalid opcode: 0000 [#1] SMP Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.558879] last sysfs file: /sys/kernel/uevent_seqnum Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.559160] Dumping ftrace buffer: Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.559360] (ftrace buffer empty) Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.559490] Modules linked in: af_key sha256_generic aes_i586 aes_generic cbc binfmt_misc bridge stp bnep input_polldev video output nfs lockd nfs_acl sunrpc dm_crypt lp ppdev psmouse serio_raw pcspkr i2c_piix4 parport_pc parport shpchp intel_agp agpgart pcnet32 mii mptspi mptscsih mptbase scsi_transport_spi floppy fbcon tileblit font bitblit softcursor Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.559829] Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560055] Pid: 23749, comm: sync Not tainted (2.6.28-17-generic #58-Ubuntu) VMware Virtual Platform Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560087] EIP: 0060:[] EFLAGS: 00210206 CPU: 1 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560729] EIP is at nfs_page_async_flush+0x7e/0x110 [nfs] Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560769] EAX: cbef709c EBX: c1305d80 ECX: 00000015 EDX: 00600020 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560792] ESI: db918bc0 EDI: cbef709c EBP: d6795da8 ESP: d6795d94 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560815] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560869] Process sync (pid: 23749, ti=d6794000 task=c20f8c90 task.ti=d6794000) Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560902] Stack: Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.560965] c1305d80 d6795e68 c1305d80 d6795e68 ffffffff d6795db8 f7f6ed93 c1305d80 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] c1305d80 d6795dc8 f7f6ee94 c1305d80 00000000 d6795e54 c01962e3 00000000 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] 0000000e f7f6ee80 d6795f44 cbef70d4 f61ef024 00000000 00000001 d6795ea0 Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] Call Trace: Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] [] ? nfs_do_writepage+0x63/0x70 [nfs] Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] [] ? nfs_writepages_callback+0x14/0x30 [nfs] Feb 24 07:41:54 la16-cgen-dev kernel: [1638079.561094] [] ? write_cache_pages+0x1a3/0x380 [..] Attached syslog file.