From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161394AbXBZXE0 (ORCPT ); Mon, 26 Feb 2007 18:04:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161399AbXBZXEZ (ORCPT ); Mon, 26 Feb 2007 18:04:25 -0500 Received: from wr-out-0506.google.com ([64.233.184.236]:9122 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161394AbXBZXEY (ORCPT ); Mon, 26 Feb 2007 18:04:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=LtQo34xsdVX9YoEFgmr3Xu4N4IRopfokehq8Dd1Z7bOzrnqThB5iThz0ooHNeA6M/KY+1gBovGsRqe82s2fDon8l8HDaab4/CKwLwVgP81GQb32nkEu8KNvLudD9QRuDnkAY7llyQy2+vOGmmbDreto6Ni2iEBj0yxgD2RA1L2s= Message-ID: <9a8748490702261504n147aa444y779153c03a2d44a2@mail.gmail.com> Date: Tue, 27 Feb 2007 00:04:19 +0100 From: "Jesper Juhl" To: "Linux Kernel Mailing List" Subject: Hang when shutting down - seems umount and NFS related - kernel version 2.6.18.1 Cc: nfs@lists.sourceforge.net MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I have a server that has the sole job of serving up a bunch of NFS filesystems to webservers. The server is running kernel 2.6.18.1 A few days ago when attempting to reboot the server, the shutdown process hung with a backtrace on the console. A photo was taken and is available here: http://www.kernel.org/pub/linux/kernel/people/juhl/images/DSC00504.jpg A quick (incomplete) text transcript of the photo is here: EIP: [] nfs_clear_inode+0x61/0x6b SS:ESP 0068:eb476ee4 BUG: warning at kernel/exit.c:855/do_exit() do_exit do_trap do_trap do_invalid_op do_invalid_op nfs_clear_inode scheduler_tick radix_tree_gang_lookup_tag nfs_wait_on_reques_locked error_code nfs3_forget_cached_acls nfs_clear_inode clear_inode dispose_list invalidate_inodes generic_shutdown_super kill_anon_super nfs_kill_super deactivate_super sys_umount sys_readlink syscall_call BUG: umount/20593, lock held at task exit time! {alloc_super} .. held by: umount:20593 ... acquired at: generic_shutdown_super /etc/rc6.d/S01reboot: line4: 20593 Segmentation fault $* [FAILED] Unmounting filesystems (retry): The problem has only manifested itself this once, so unfortunately not reproducible on demand, but I hope that maybe someone more knowledgable of NFS internals than me can figure out what went wrong and a way to fix it in the future (if it's not already fixed) :-) -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html