On Mon, Apr 28, 2014 at 04:29:02PM -0600, Bob Mastors wrote: > Greetings, > > I have an xfs umount hang caused by forcing the block device to return > i/o errors while copying files to the filesystem. > Detailed steps to reproduce the problem on virtualbox are below. > > The linux version is a recent pull and reports as 3.15.0-rc3. > > [ 2040.248096] INFO: task umount:10303 blocked for more than 120 seconds. > [ 2040.323947] Not tainted 3.15.0-rc3 #4 > [ 2040.343423] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2040.352665] umount D ffffffff8180fe40 0 10303 8691 > 0x00000000 > [ 2040.404918] ffff88001e33dd58 0000000000000086 ffff88001e33dd48 > ffffffff81080f82 > [ 2040.489901] ffff88001b311900 0000000000013180 ffff88001e33dfd8 > 0000000000013180 > [ 2040.534772] ffff88003daa3200 ffff88001b311900 ffff88002421aec0 > ffff88002421ae80 > [ 2040.587450] Call Trace: > [ 2040.592176] [<ffffffff81080f82>] ? try_to_wake_up+0x232/0x2b0 > [ 2040.620212] [<ffffffff816c54d9>] schedule+0x29/0x70 > [ 2040.627685] [<ffffffffa04c4cd6>] xfs_ail_push_all_sync+0x96/0xd0 [xfs] > [ 2040.632236] [<ffffffff81092230>] ? __wake_up_sync+0x20/0x20 > [ 2040.659105] [<ffffffffa04731a3>] xfs_unmountfs+0x63/0x160 [xfs] > [ 2040.691774] [<ffffffffa0478f65>] ? kmem_free+0x35/0x40 [xfs] > [ 2040.698610] [<ffffffffa0474cf5>] xfs_fs_put_super+0x25/0x60 [xfs] > [ 2040.706838] [<ffffffff8119561e>] generic_shutdown_super+0x7e/0x100 > [ 2040.723958] [<ffffffff811956d0>] kill_block_super+0x30/0x80 > [ 2040.734963] [<ffffffff8119591d>] deactivate_locked_super+0x4d/0x80 > [ 2040.745485] [<ffffffff8119652e>] deactivate_super+0x4e/0x70 > [ 2040.751274] [<ffffffff811b1d42>] mntput_no_expire+0xd2/0x160 > [ 2040.755894] [<ffffffff811b2fff>] SyS_umount+0xaf/0x3b0 > [ 2040.761032] [<ffffffff816d1592>] system_call_fastpath+0x16/0x1b > [ .060058] XFS (sdb): xfs_log_force: error 5 returned. > [ 268059] XFS (sdb): xfs_log_force: error 5 returned. > > I took a look at xfs_ail_push_all_sync and it is pretty easy to see > the hang. But it is not obvious to me how to fix it. > Any ideas would be appreciated. > > I am available to run additional tests or capture more logging > or whatever if that would help. What's the entire log output from the first shutdown message? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
