From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753257Ab2DRCYa (ORCPT ); Tue, 17 Apr 2012 22:24:30 -0400 Received: from smtp1.onthe.net.au ([203.22.196.249]:52186 "EHLO smtp1.onthe.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753048Ab2DRCY2 (ORCPT ); Tue, 17 Apr 2012 22:24:28 -0400 Date: Wed, 18 Apr 2012 12:24:20 +1000 From: Chris Dunlop To: Linux Kernel Mailing List Subject: 3.3.1: hung task in __lock_page Message-ID: <20120418022420.GA5949@onthe.net.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org G'day, Linux-3.3.1, x64, md/lvm, deadline scheduler. 3 LVs exported via aoe, 1 LV exported via iscsi. The machine had been running with this configuration for 19 hours with light to moderate load on the various exports. 20 min before the hung task message a large 'rm -r' was started on a different aoe export to the hung vblade task and was still running at the time of the hang. The hung vblade task caused the associated aoe export to have a conniption, but otherwise everything seems to be humming along fine. [69137.699722] INFO: task vblade:6826 blocked for more than 120 seconds. [69137.699759] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [69137.699810] vblade D 0000000000000002 0 6826 3881 0x00000000 [69137.699852] ffff880be9c1ba78 0000000000000046 ffff880c00a6c3c0 00000000001d38c0 [69137.699909] ffff880be9c1bfd8 ffff880be9c1a010 00000000001d38c0 00000000001d38c0 [69137.699965] ffff880be9c1bfd8 00000000001d38c0 ffff880c085a43c0 ffff880c00a6c3c0 [69137.700021] Call Trace: [69137.700048] [] ? __lock_page+0x70/0x70 [69137.700080] [] schedule+0x3f/0x60 [69137.700108] [] io_schedule+0x8c/0xd0 [69137.700136] [] sleep_on_page+0xe/0x20 [69137.700165] [] __wait_on_bit+0x5f/0x90 [69137.700195] [] wait_on_page_bit+0x73/0x80 [69137.700226] [] ? autoremove_wake_function+0x40/0x40 [69137.700259] [] ? sched_clock_cpu+0xcd/0x110 [69137.700289] [] grab_cache_page_write_begin+0xa1/0xd0 [69137.700323] [] ? I_BDEV+0x10/0x10 [69137.700351] [] block_write_begin+0x38/0x90 [69137.700383] [] ? do_raw_spin_unlock+0x5e/0xb0 [69137.700413] [] blkdev_write_begin+0x23/0x30 [69137.700443] [] generic_file_buffered_write+0x11b/0x2a0 [69137.700477] [] ? current_fs_time+0x27/0x30 [69137.700507] [] __generic_file_aio_write+0x23b/0x470 [69137.700539] [] blkdev_aio_write+0x36/0x90 [69137.700570] [] do_sync_write+0xe2/0x120 [69137.700599] [] ? fsnotify+0x1f3/0x360 [69137.700630] [] ? T.1251+0x51/0x60 [69137.700658] [] vfs_write+0xd0/0x1a0 [69137.700687] [] sys_pwrite64+0x9a/0xb0 [69137.700717] [] system_call_fastpath+0x16/0x1b [69137.700747] no locks held by vblade/6826. Cheers, Chris.