From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754183AbYLOI5w (ORCPT ); Mon, 15 Dec 2008 03:57:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752223AbYLOI5n (ORCPT ); Mon, 15 Dec 2008 03:57:43 -0500 Received: from smtp-out003.kontent.com ([81.88.40.217]:58607 "EHLO smtp-out003.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752018AbYLOI5m (ORCPT ); Mon, 15 Dec 2008 03:57:42 -0500 From: Oliver Neukum Organization: Novell To: linux-kernel@vger.kernel.org, reiserfs-devel@vger.kernel.org Subject: locking checker reported on reiserfs in 2.6.28-rc8 Date: Mon, 15 Dec 2008 09:59:33 +0100 User-Agent: KMail/1.9.9 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200812150959.33392.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I got this in the log. No noticeable ill effect. 2.6.28-rc8 on x86_64. Regards Oliver Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: ======================================================= Dec 15 09:50:53 vanamonde kernel: [ INFO: possible circular locking dependency detected ] Dec 15 09:50:53 vanamonde kernel: 2.6.28-rc8-default #3 Dec 15 09:50:53 vanamonde kernel: ------------------------------------------------------- Dec 15 09:50:53 vanamonde kernel: kmail/3204 is trying to acquire lock: Dec 15 09:50:53 vanamonde kernel: (&sb->s_type->i_mutex_key#12){--..}, at: [] vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: but task is already holding lock: Dec 15 09:50:53 vanamonde kernel: (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [] reiserfs_delete_xattrs+0xff/0x16b [reiserfs] Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: which lock already depends on the new lock. Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: the existing dependency chain (in reverse order) is: Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: -> #1 (&REISERFS_SB(s)->xattr_dir_sem){----}: Dec 15 09:50:53 vanamonde kernel: [] __lock_acquire+0x1291/0x15be Dec 15 09:50:53 vanamonde kernel: [] lock_acquire+0x8d/0xba Dec 15 09:50:53 vanamonde kernel: [] down_read+0x45/0x52 Dec 15 09:50:53 vanamonde kernel: [] reiserfs_acl_chmod+0x69/0x1c0 [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] reiserfs_setattr+0x243/0x26b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] notify_change+0x194/0x2da Dec 15 09:50:53 vanamonde kernel: [] sys_fchmodat+0x91/0xbd Dec 15 09:50:53 vanamonde kernel: [] sys_chmod+0x13/0x15 Dec 15 09:50:53 vanamonde kernel: [] system_call_fastpath+0x16/0x1b Dec 15 09:50:53 vanamonde kernel: [] 0xffffffffffffffff Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: -> #0 (&sb->s_type->i_mutex_key#12){--..}: Dec 15 09:50:53 vanamonde kernel: [] __lock_acquire+0xfa2/0x15be Dec 15 09:50:53 vanamonde kernel: [] lock_acquire+0x8d/0xba Dec 15 09:50:53 vanamonde kernel: [] mutex_lock_nested+0xf9/0x2a0 Dec 15 09:50:53 vanamonde kernel: [] vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: [] reiserfs_delete_xattrs+0x10b/0x16b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] reiserfs_delete_inode+0x75/0x11b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] generic_delete_inode+0xb8/0x145 Dec 15 09:50:53 vanamonde kernel: [] generic_drop_inode+0x17/0x17c Dec 15 09:50:53 vanamonde kernel: [] iput+0x61/0x65 Dec 15 09:50:53 vanamonde kernel: [] do_unlinkat+0x103/0x159 Dec 15 09:50:53 vanamonde kernel: [] sys_unlink+0x11/0x13 Dec 15 09:50:53 vanamonde kernel: [] system_call_fastpath+0x16/0x1b Dec 15 09:50:53 vanamonde kernel: [] 0xffffffffffffffff Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: other info that might help us debug this: Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: 1 lock held by kmail/3204: Dec 15 09:50:53 vanamonde kernel: #0: (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [] reiserfs_delete_xattrs+0xff/0x16b [reiserfs] Dec 15 09:50:53 vanamonde kernel: Dec 15 09:50:53 vanamonde kernel: stack backtrace: Dec 15 09:50:53 vanamonde kernel: Pid: 3204, comm: kmail Not tainted 2.6.28-rc8-default #3 Dec 15 09:50:53 vanamonde kernel: Call Trace: Dec 15 09:50:53 vanamonde kernel: [] print_circular_bug_tail+0xb8/0xc3 Dec 15 09:50:53 vanamonde kernel: [] __lock_acquire+0xfa2/0x15be Dec 15 09:50:53 vanamonde kernel: [] lock_acquire+0x8d/0xba Dec 15 09:50:53 vanamonde kernel: [] ? vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: [] mutex_lock_nested+0xf9/0x2a0 Dec 15 09:50:53 vanamonde kernel: [] ? vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: [] ? vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: [] ? _spin_unlock_irq+0x2b/0x37 Dec 15 09:50:53 vanamonde kernel: [] ? may_delete+0x65/0x147 Dec 15 09:50:53 vanamonde kernel: [] vfs_rmdir+0x8b/0x104 Dec 15 09:50:53 vanamonde kernel: [] reiserfs_delete_xattrs+0x10b/0x16b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] reiserfs_delete_inode+0x75/0x11b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] ? _raw_spin_unlock+0x8e/0x94 Dec 15 09:50:53 vanamonde kernel: [] ? reiserfs_delete_inode+0x0/0x11b [reiserfs] Dec 15 09:50:53 vanamonde kernel: [] generic_delete_inode+0xb8/0x145 Dec 15 09:50:53 vanamonde kernel: [] generic_drop_inode+0x17/0x17c Dec 15 09:50:53 vanamonde kernel: [] iput+0x61/0x65 Dec 15 09:50:53 vanamonde kernel: [] do_unlinkat+0x103/0x159 Dec 15 09:50:53 vanamonde kernel: [] ? sysret_check+0x46/0x81 Dec 15 09:50:53 vanamonde kernel: [] ? trace_hardirqs_on_caller+0xf6/0x11a Dec 15 09:50:53 vanamonde kernel: [] ? trace_hardirqs_on_thunk+0x3a/0x3f Dec 15 09:50:53 vanamonde kernel: [] ? do_path_lookup+0x47/0x1c8 Dec 15 09:50:53 vanamonde kernel: [] sys_unlink+0x11/0x13 Dec 15 09:50:53 vanamonde kernel: [] system_call_fastpath+0x16/0x1b