On Wed, May 14, 2014 at 08:28:30AM -0400, Chris Mason wrote:
> I think Filipe fixed this one:
>
> https://patchwork.kernel.org/patch/4143821/
I applied this patch, and I don't have the same deadlock anymore, but
legolas:/mnt/btrfs_pool1# btrfs-subvolume-backup --init -k 5 var
/mnt/btrfs_pool2/
Create a readonly snapshot of 'var' in './var_ro.20140514_06:39:50'
At subvol var_ro.20140514_06:39:50
At subvol var_ro.20140514_06:39:50
has been hung for 8H and only copied 200MB.
I have 2 CPUs stuck at 100% and dmesg shows:
INFO: task btrfs-cleaner:3479 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs-cleaner D 0000000000000000 0 3479 2 0x00000000
ffff8800ca2d9d00 0000000000000046 ffff880401f5b270 ffff8800ca2d9fd8
ffff8800ca1a6110 00000000000141c0 ffff8800c32d2700 ffff8800ca2c11e8
0000000000000000 ffff8800ca2c1000 ffff8803cc4dcf20 ffff8800ca2d9d10
Call Trace:
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8122a4cb>] wait_current_trans.isra.15+0x98/0xf4
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8122b9e5>] start_transaction+0x498/0x4fc
[<ffffffff8122bdcf>] ? __btrfs_end_transaction+0x2a8/0x2cd
[<ffffffff8122ba64>] btrfs_start_transaction+0x1b/0x1d
[<ffffffff8121c550>] btrfs_drop_snapshot+0x443/0x610
[<ffffffff8161ef9b>] ? _raw_spin_unlock+0x17/0x2a
[<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[<ffffffff8122c20d>] btrfs_clean_one_deleted_snapshot+0x103/0x10f
[<ffffffff812248e5>] cleaner_kthread+0x103/0x136
[<ffffffff812247e2>] ? btrfs_alloc_root+0x26/0x26
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task btrfs-transacti:3480 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs-transacti D 0000000000000000 0 3480 2 0x00000000
ffff8800ccac1b00 0000000000000046 ffff8804067bd2b8 ffff8800ccac1fd8
ffff8800ca1925d0 00000000000141c0 ffff880401bb6100 ffff8803e9700c40
ffff880401bb6140 ffff880401f5b000 ffff8804067bd280 ffff8800ccac1b10
Call Trace:
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff81215b97>] cache_block_group+0x12d/0x343
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8121a966>] find_free_extent+0x391/0x89e
[<ffffffff8121afce>] btrfs_reserve_extent+0x70/0x114
[<ffffffff81231f04>] __btrfs_prealloc_file_range+0xcc/0x2d8
[<ffffffff8120c445>] ? btrfs_free_path+0x26/0x29
[<ffffffff81237f0b>] btrfs_prealloc_file_range_trans+0x30/0x32
[<ffffffff8121db72>] btrfs_write_dirty_block_groups+0x24b/0x556
[<ffffffff81617c91>] commit_cowonly_roots+0x14d/0x219
[<ffffffff8122b0eb>] btrfs_commit_transaction+0x44e/0x8b0
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff81227791>] transaction_kthread+0xf8/0x1ab
[<ffffffff81227699>] ? btrfs_cleanup_transaction+0x44c/0x44c
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task kworker/u16:13:12552 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u16:13 D 0000000000000000 0 12552 2 0x00000080
Workqueue: writeback bdi_writeback_workfn (flush-btrfs-2)
ffff8803bd841a00 0000000000000046 ffff8803bd8419d0 ffff8803bd841fd8
ffff8803bd90a190 00000000000141c0 ffff88041e2941c0 ffff8803bd90a190
ffff8803bd841aa0 0000000000000002 ffffffff810fda1a ffff8803bd841a10
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff81240c41>] lock_page+0x1e/0x21
[<ffffffff81244779>] extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c3
[<ffffffff81244bd4>] extent_writepages+0x4b/0x5c
[<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[<ffffffff8162280c>] ? preempt_count_add+0x77/0x8d
[<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[<ffffffff811082b1>] do_writepages+0x1e/0x2c
[<ffffffff81175ef2>] __writeback_single_inode+0x7d/0x238
[<ffffffff81176c2a>] writeback_sb_inodes+0x1eb/0x339
[<ffffffff81176dec>] __writeback_inodes_wb+0x74/0xb7
[<ffffffff81176f67>] wb_writeback+0x138/0x293
[<ffffffff81107584>] ? bdi_dirty_limit+0x31/0x91
[<ffffffff811775dd>] bdi_writeback_workfn+0x1d8/0x329
[<ffffffff8100d047>] ? load_TLS+0xb/0xf
[<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[<ffffffff8106624a>] worker_thread+0x136/0x205
[<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task kworker/u16:1:13077 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u16:1 D 0000000000000000 0 13077 2 0x00000080
Workqueue: btrfs-delalloc normal_work_helper
ffff8803b50fd860 0000000000000046 ffff8803b50fd830 ffff8803b50fdfd8
ffff8803b77282d0 00000000000141c0 ffff88041e2d41c0 ffff8803b77282d0
ffff8803b50fd900 0000000000000002 ffffffff810fda1a ffff8803b50fd870
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff810fe3c9>] lock_page+0x19/0x1c
[<ffffffff810fe425>] find_lock_entry+0x33/0x55
[<ffffffff810fe455>] find_lock_page+0xe/0x1b
[<ffffffff810fe93e>] find_or_create_page+0x31/0x83
[<ffffffff8125ee32>] io_ctl_prepare_pages+0x49/0x11c
[<ffffffff812609e2>] __load_free_space_cache+0x1be/0x56c
[<ffffffff81260e76>] load_free_space_cache+0xe6/0x199
[<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[<ffffffff81215c2e>] cache_block_group+0x1c4/0x343
[<ffffffff812611c2>] ? btrfs_find_space_for_alloc+0x1f8/0x21d
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8121a966>] find_free_extent+0x391/0x89e
[<ffffffff8121afce>] btrfs_reserve_extent+0x70/0x114
[<ffffffff8123087c>] cow_file_range+0x1b0/0x388
[<ffffffff8123152b>] submit_compressed_extents+0x102/0x40f
[<ffffffff8122fa27>] ? async_cow_free+0x24/0x27
[<ffffffff812318be>] async_cow_submit+0x86/0x8b
[<ffffffff81250629>] normal_work_helper+0x194/0x240
[<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[<ffffffff8106624a>] worker_thread+0x136/0x205
[<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task btrfs:13329 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs D 0000000000000004 0 13329 13305 0x00000080
ffff8803aaf75b10 0000000000000082 ffff8803aaf75ae0 ffff8803aaf75fd8
ffff8803aa8165d0 00000000000141c0 ffff88041e3141c0 ffff8803aa8165d0
ffff8803aaf75bb0 0000000000000002 ffffffff810fda1a ffff8803aaf75b20
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff81240c41>] lock_page+0x1e/0x21
[<ffffffff81244779>] extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c3
[<ffffffff8110a5b2>] ? pagevec_lookup_entries+0x1e/0x26
[<ffffffff8110ae23>] ? truncate_inode_pages_range+0x2a9/0x3ad
[<ffffffff81211106>] ? setup_items_for_insert+0x2ba/0x2da
[<ffffffff81244bd4>] extent_writepages+0x4b/0x5c
[<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[<ffffffff811082b1>] do_writepages+0x1e/0x2c
[<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[<ffffffff8123fcda>] btrfs_wait_ordered_range+0x85/0x11a
[<ffffffff8123321e>] btrfs_truncate+0x45/0x22b
[<ffffffff81233cb1>] btrfs_setattr+0x19b/0x273
[<ffffffff8116b148>] notify_change+0x1be/0x2a6
[<ffffffff81153d74>] do_truncate+0x69/0x90
[<ffffffff81153e8c>] vfs_truncate+0xf1/0x11f
[<ffffffff81153f04>] do_sys_truncate+0x4a/0x86
[<ffffffff81154041>] SyS_truncate+0xe/0x10
[<ffffffff81625bad>] system_call_fastpath+0x1a/0x1f
INFO: task btrfs-cleaner:3479 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs-cleaner D 0000000000000000 0 3479 2 0x00000000
ffff8800ca2d9d00 0000000000000046 ffff880401f5b270 ffff8800ca2d9fd8
ffff8800ca1a6110 00000000000141c0 ffff8800c32d2700 ffff8800ca2c11e8
0000000000000000 ffff8800ca2c1000 ffff8803cc4dcf20 ffff8800ca2d9d10
Call Trace:
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8122a4cb>] wait_current_trans.isra.15+0x98/0xf4
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8122b9e5>] start_transaction+0x498/0x4fc
[<ffffffff8122bdcf>] ? __btrfs_end_transaction+0x2a8/0x2cd
[<ffffffff8122ba64>] btrfs_start_transaction+0x1b/0x1d
[<ffffffff8121c550>] btrfs_drop_snapshot+0x443/0x610
[<ffffffff8161ef9b>] ? _raw_spin_unlock+0x17/0x2a
[<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[<ffffffff8122c20d>] btrfs_clean_one_deleted_snapshot+0x103/0x10f
[<ffffffff812248e5>] cleaner_kthread+0x103/0x136
[<ffffffff812247e2>] ? btrfs_alloc_root+0x26/0x26
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task btrfs-transacti:3480 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs-transacti D 0000000000000000 0 3480 2 0x00000000
ffff8800ccac1b00 0000000000000046 ffff8804067bd2b8 ffff8800ccac1fd8
ffff8800ca1925d0 00000000000141c0 ffff880401bb6100 ffff8803e9700c40
ffff880401bb6140 ffff880401f5b000 ffff8804067bd280 ffff8800ccac1b10
Call Trace:
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff81215b97>] cache_block_group+0x12d/0x343
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8121a966>] find_free_extent+0x391/0x89e
[<ffffffff8121afce>] btrfs_reserve_extent+0x70/0x114
[<ffffffff81231f04>] __btrfs_prealloc_file_range+0xcc/0x2d8
[<ffffffff8120c445>] ? btrfs_free_path+0x26/0x29
[<ffffffff81237f0b>] btrfs_prealloc_file_range_trans+0x30/0x32
[<ffffffff8121db72>] btrfs_write_dirty_block_groups+0x24b/0x556
[<ffffffff81617c91>] commit_cowonly_roots+0x14d/0x219
[<ffffffff8122b0eb>] btrfs_commit_transaction+0x44e/0x8b0
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff81227791>] transaction_kthread+0xf8/0x1ab
[<ffffffff81227699>] ? btrfs_cleanup_transaction+0x44c/0x44c
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task kworker/u16:13:12552 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u16:13 D 0000000000000000 0 12552 2 0x00000080
Workqueue: writeback bdi_writeback_workfn (flush-btrfs-2)
ffff8803bd841a00 0000000000000046 ffff8803bd8419d0 ffff8803bd841fd8
ffff8803bd90a190 00000000000141c0 ffff88041e2941c0 ffff8803bd90a190
ffff8803bd841aa0 0000000000000002 ffffffff810fda1a ffff8803bd841a10
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff81240c41>] lock_page+0x1e/0x21
[<ffffffff81244779>] extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c3
[<ffffffff81244bd4>] extent_writepages+0x4b/0x5c
[<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[<ffffffff8162280c>] ? preempt_count_add+0x77/0x8d
[<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[<ffffffff811082b1>] do_writepages+0x1e/0x2c
[<ffffffff81175ef2>] __writeback_single_inode+0x7d/0x238
[<ffffffff81176c2a>] writeback_sb_inodes+0x1eb/0x339
[<ffffffff81176dec>] __writeback_inodes_wb+0x74/0xb7
[<ffffffff81176f67>] wb_writeback+0x138/0x293
[<ffffffff81107584>] ? bdi_dirty_limit+0x31/0x91
[<ffffffff811775dd>] bdi_writeback_workfn+0x1d8/0x329
[<ffffffff8100d047>] ? load_TLS+0xb/0xf
[<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[<ffffffff8106624a>] worker_thread+0x136/0x205
[<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task kworker/u16:1:13077 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u16:1 D 0000000000000000 0 13077 2 0x00000080
Workqueue: btrfs-delalloc normal_work_helper
ffff8803b50fd860 0000000000000046 ffff8803b50fd830 ffff8803b50fdfd8
ffff8803b77282d0 00000000000141c0 ffff88041e2d41c0 ffff8803b77282d0
ffff8803b50fd900 0000000000000002 ffffffff810fda1a ffff8803b50fd870
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff810fe3c9>] lock_page+0x19/0x1c
[<ffffffff810fe425>] find_lock_entry+0x33/0x55
[<ffffffff810fe455>] find_lock_page+0xe/0x1b
[<ffffffff810fe93e>] find_or_create_page+0x31/0x83
[<ffffffff8125ee32>] io_ctl_prepare_pages+0x49/0x11c
[<ffffffff812609e2>] __load_free_space_cache+0x1be/0x56c
[<ffffffff81260e76>] load_free_space_cache+0xe6/0x199
[<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[<ffffffff81215c2e>] cache_block_group+0x1c4/0x343
[<ffffffff812611c2>] ? btrfs_find_space_for_alloc+0x1f8/0x21d
[<ffffffff8108473d>] ? finish_wait+0x65/0x65
[<ffffffff8121a966>] find_free_extent+0x391/0x89e
[<ffffffff8121afce>] btrfs_reserve_extent+0x70/0x114
[<ffffffff8123087c>] cow_file_range+0x1b0/0x388
[<ffffffff8123152b>] submit_compressed_extents+0x102/0x40f
[<ffffffff8122fa27>] ? async_cow_free+0x24/0x27
[<ffffffff812318be>] async_cow_submit+0x86/0x8b
[<ffffffff81250629>] normal_work_helper+0x194/0x240
[<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[<ffffffff8106624a>] worker_thread+0x136/0x205
[<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[<ffffffff8106b467>] kthread+0xae/0xb6
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[<ffffffff81625afc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
INFO: task btrfs:13329 blocked for more than 120 seconds.
Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
btrfs D 0000000000000004 0 13329 13305 0x00000080
ffff8803aaf75b10 0000000000000082 ffff8803aaf75ae0 ffff8803aaf75fd8
ffff8803aa8165d0 00000000000141c0 ffff88041e3141c0 ffff8803aa8165d0
ffff8803aaf75bb0 0000000000000002 ffffffff810fda1a ffff8803aaf75b20
Call Trace:
[<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[<ffffffff8161c876>] schedule+0x73/0x75
[<ffffffff8161ca1b>] io_schedule+0x60/0x7a
[<ffffffff810fda28>] sleep_on_page+0xe/0x12
[<ffffffff8161cdab>] __wait_on_bit_lock+0x46/0x8a
[<ffffffff810fdae3>] __lock_page+0x69/0x6b
[<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[<ffffffff81240c41>] lock_page+0x1e/0x21
[<ffffffff81244779>] extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c3
[<ffffffff8110a5b2>] ? pagevec_lookup_entries+0x1e/0x26
[<ffffffff8110ae23>] ? truncate_inode_pages_range+0x2a9/0x3ad
[<ffffffff81211106>] ? setup_items_for_insert+0x2ba/0x2da
[<ffffffff81244bd4>] extent_writepages+0x4b/0x5c
[<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[<ffffffff811082b1>] do_writepages+0x1e/0x2c
[<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[<ffffffff8123fcda>] btrfs_wait_ordered_range+0x85/0x11a
[<ffffffff8123321e>] btrfs_truncate+0x45/0x22b
[<ffffffff81233cb1>] btrfs_setattr+0x19b/0x273
[<ffffffff8116b148>] notify_change+0x1be/0x2a6
[<ffffffff81153d74>] do_truncate+0x69/0x90
[<ffffffff81153e8c>] vfs_truncate+0xf1/0x11f
[<ffffffff81153f04>] do_sys_truncate+0x4a/0x86
[<ffffffff81154041>] SyS_truncate+0xe/0x10
[<ffffffff81625bad>] system_call_fastpath+0x1a/0x1f
Nothing after that.
btrfs receive /mnt/btrfs_pool2
seems uninterruptible and suck on sleep_on_page:
legolas:/mnt/btrfs_pool1# ps -eo pid,user,args,wchan | grep btrfs
526 root [btrfs-worker] rescuer_thread
527 root [btrfs-worker-hi] rescuer_thread
528 root [btrfs-delalloc] rescuer_thread
529 root [btrfs-flush_del] rescuer_thread
530 root [btrfs-cache] rescuer_thread
531 root [btrfs-submit] rescuer_thread
532 root [btrfs-fixup] rescuer_thread
533 root [btrfs-endio] rescuer_thread
534 root [btrfs-endio-met] rescuer_thread
535 root [btrfs-endio-met] rescuer_thread
536 root [btrfs-endio-rai] rescuer_thread
537 root [btrfs-rmw] rescuer_thread
538 root [btrfs-endio-wri] rescuer_thread
539 root [btrfs-freespace] rescuer_thread
540 root [btrfs-delayed-m] rescuer_thread
541 root [btrfs-readahead] rescuer_thread
542 root [btrfs-qgroup-re] rescuer_thread
543 root [btrfs-cleaner] cleaner_kthread
544 root [btrfs-transacti] transaction_kthread
2424 root [btrfs-worker] rescuer_thread
2425 root [btrfs-worker-hi] rescuer_thread
2426 root [btrfs-delalloc] rescuer_thread
2427 root [btrfs-flush_del] rescuer_thread
2428 root [btrfs-cache] rescuer_thread
2429 root [btrfs-submit] rescuer_thread
2430 root [btrfs-fixup] rescuer_thread
2431 root [btrfs-endio] rescuer_thread
2432 root [btrfs-endio-met] rescuer_thread
2433 root [btrfs-endio-met] rescuer_thread
2434 root [btrfs-endio-rai] rescuer_thread
2435 root [btrfs-rmw] rescuer_thread
2436 root [btrfs-endio-wri] rescuer_thread
2437 root [btrfs-freespace] rescuer_thread
2438 root [btrfs-delayed-m] rescuer_thread
2439 root [btrfs-readahead] rescuer_thread
2440 root [btrfs-qgroup-re] rescuer_thread
3479 root [btrfs-cleaner] wait_current_trans.isra.15
3480 root [btrfs-transacti] cache_block_group
13329 root btrfs receive /mnt/btrfs_po sleep_on_page
I now still have 2 CPUs stuck, looks like I'll need to reboot.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | PGP 1024R/763BE901
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