From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id 2A36E6B01D0 for ; Wed, 26 May 2010 07:13:31 -0400 (EDT) Date: Wed, 26 May 2010 13:13:26 +0200 From: Christoph Hellwig Subject: writeback hang in current mainline Message-ID: <20100526111326.GA28541@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linux-mm@kvack.org To: jens.axboe@oracle.com Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org List-ID: When running xfstests on current Linus' tree I get the following reproducible hang during test 013: 013 76s ...[ 196.150570] XFS mounting filesystem vdb5 [ 360.596137] INFO: task fsstress:7898 blocked for more than 120 seconds. [ 360.598053] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 360.600678] fsstress D 00000006 0 7898 7897 0x00000000 [ 360.602661] f3a1beb0 00000046 f3a1be84 00000006 c1e164a0 00000282 f3a1be8c c0e5f980 [ 360.606072] f3eca340 f5c07540 c0e5f980 c0e5f980 f3eca340 c01805d9 f3a1bee4 00000000 [ 360.609495] f3a1beec f3a1beb8 c0222b38 f3a1bed4 c08fcf35 c0222b30 c1e164a0 c1e164a0 [ 360.612944] Call Trace: [ 360.613918] [] ? prepare_to_wait+0x49/0x70 [ 360.615432] [] bdi_sched_wait+0x8/0x10 [ 360.617019] [] __wait_on_bit+0x45/0x70 [ 360.618448] [] ? bdi_sched_wait+0x0/0x10 [ 360.619934] [] ? bdi_sched_wait+0x0/0x10 [ 360.621520] [] out_of_line_wait_on_bit+0xa3/0xb0 [ 360.623169] [] ? wake_bit_function+0x0/0x50 [ 360.624812] [] bdi_alloc_queue_work+0xac/0x110 [ 360.626395] [] ? vfs_quota_sync+0x0/0x2b0 [ 360.627961] [] bdi_start_writeback+0x47/0x50 [ 360.629632] [] writeback_inodes_sb_locked+0x41/0x50 [ 360.631319] [] __sync_filesystem+0x4a/0x90 [ 360.632955] [] sync_one_sb+0x1a/0x20 [ 360.634360] [] iterate_supers+0x6c/0xa0 [ 360.635842] [] ? sync_one_sb+0x0/0x20 [ 360.637372] [] sys_sync+0x24/0x60 [ 360.638751] [] sysenter_do_call+0x12/0x3c [ 360.640321] 1 lock held by fsstress/7898: [ 360.641623] #0: (&type->s_umount_key#19){++++..}, at: [] iterate_supers+0x5d/0xa0 This works fine with the xfs tree which has the same xfs code, but is otherwise at 2.6.34 level. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org