On Wed, Oct 10, 2012 at 06:07:22PM +0800, zwu.kernel@xxxxxxxxx wrote: > From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> > > NOTE: > > The patchset is currently post out mainly to make sure > it is going in the correct direction and hope to get some > helpful comments from other guys. > For more infomation, please check hot_tracking.txt in Documentation > # mount -o hot_track /dev/vdc /mnt/scratch # umount /mnt/scratch hangs here on XFS: # echo w > /proc/sysrq-trigger [ 44.229252] SysRq : Show Blocked State [ 44.230044] task PC stack pid father [ 44.231187] umount D ffff88021fd52dc0 3632 4107 4106 0x00000000 [ 44.231946] ffff880212a91bd8 0000000000000086 ffff8802153da300 ffff880212a91fd8 [ 44.231946] ffff880212a91fd8 ffff880212a91fd8 ffff880216cf6340 ffff8802153da300 [ 44.231946] 00000000ffffffff 7fffffffffffffff ffff880212a91d78 ffff880212a91d80 [ 44.231946] Call Trace: [ 44.231946] [<ffffffff81b6c1b9>] schedule+0x29/0x70 [ 44.231946] [<ffffffff81b6a079>] schedule_timeout+0x159/0x220 [ 44.231946] [<ffffffff8171a2f4>] ? do_raw_spin_lock+0x54/0x120 [ 44.231946] [<ffffffff8171a45d>] ? do_raw_spin_unlock+0x5d/0xb0 [ 44.231946] [<ffffffff81b6bfee>] wait_for_common+0xee/0x190 [ 44.231946] [<ffffffff810b6a10>] ? try_to_wake_up+0x2f0/0x2f0 [ 44.231946] [<ffffffff81b6c18d>] wait_for_completion+0x1d/0x20 [ 44.231946] [<ffffffff8109efec>] flush_workqueue+0x14c/0x3f0 [ 44.231946] [<ffffffff811aad89>] hot_track_exit+0x39/0x180 [ 44.231946] [<ffffffff81454e83>] xfs_fs_put_super+0x23/0x70 [ 44.231946] [<ffffffff8117a991>] generic_shutdown_super+0x61/0xf0 [ 44.231946] [<ffffffff8117aa50>] kill_block_super+0x30/0x80 [ 44.231946] [<ffffffff8117ae45>] deactivate_locked_super+0x45/0x70 [ 44.231946] [<ffffffff8117ba0e>] deactivate_super+0x4e/0x70 [ 44.231946] [<ffffffff81197541>] mntput_no_expire+0x101/0x160 [ 44.231946] [<ffffffff811985b6>] sys_umount+0x76/0x3a0 [ 44.231946] [<ffffffff81b755a9>] system_call_fastpath+0x16/0x1b because this is stuck: [ 200.064574] kworker/u:2 S ffff88021fc12dc0 5208 669 2 0x00000000 [ 200.064574] ffff88021532fc60 0000000000000046 ffff88021532c7c0 ffff88021532ffd8 [ 200.064574] ffff88021532ffd8 ffff88021532ffd8 ffffffff81fc3420 ffff88021532c7c0 [ 200.064574] ffff88021532fc50 ffff88021532fc98 ffffffff8221e700 ffffffff8221e700 [ 200.064574] Call Trace: [ 200.064574] [<ffffffff81b6c1b9>] schedule+0x29/0x70 [ 200.064574] [<ffffffff81b6a03b>] schedule_timeout+0x11b/0x220 [ 200.064574] [<ffffffff810908d0>] ? usleep_range+0x50/0x50 [ 200.064574] [<ffffffff811aa78a>] hot_temperature_update_work+0x16a/0x1c0 [ 200.064574] [<ffffffff8171a2f4>] ? do_raw_spin_lock+0x54/0x120 [ 200.064574] [<ffffffff81b6d3ce>] ? _raw_spin_unlock_irq+0xe/0x30 [ 200.064574] [<ffffffff810b0b3c>] ? finish_task_switch+0x5c/0x100 [ 200.064574] [<ffffffff8109d959>] process_one_work+0x139/0x500 [ 200.064574] [<ffffffff811aa620>] ? hot_range_update+0x1f0/0x1f0 [ 200.064574] [<ffffffff8109e63e>] worker_thread+0x15e/0x460 [ 200.064574] [<ffffffff8109e4e0>] ? manage_workers+0x2f0/0x2f0 [ 200.064574] [<ffffffff810a4b33>] kthread+0x93/0xa0 [ 200.064574] [<ffffffff81b765c4>] kernel_thread_helper+0x4/0x10 [ 200.064574] [<ffffffff810a4aa0>] ? __init_kthread_worker+0x40/0x40 [ 200.064574] [<ffffffff81b765c0>] ? gs_change+0x13/0x13 Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
