[14579.035904] SysRq : Show Blocked State
[14579.036658]   task                        PC stack   pid father
[14579.036689] btrfs-transacti D ffff88041fc52ec0     0  1035      2 0x00000000
[14579.036689]  ffff88040f1f80d0 0000000000000046 ffff880000000000 ffff88040ccdcca0
[14579.036689]  0000000000012ec0 ffff88003664bfd8 0000000000012ec0 ffff88040ccdcca0
[14579.036689]  ffff88040bd94260 ffff88041fc53770 ffff88040ccdcca0 ffffffff8114cd80
[14579.036689] Call Trace:
[14579.036699]  [<ffffffff8114cd80>] ? __lock_page+0x70/0x70
[14579.036704]  [<ffffffff81547c5c>] ? io_schedule+0x8c/0xd0
[14579.036706]  [<ffffffff8114cd8e>] ? sleep_on_page+0xe/0x20
[14579.036708]  [<ffffffff8154828a>] ? __wait_on_bit+0x5a/0x90
[14579.036710]  [<ffffffff8114da0f>] ? find_get_pages_tag+0xcf/0x180
[14579.036712]  [<ffffffff8114ced8>] ? wait_on_page_bit+0x78/0x80
[14579.036717]  [<ffffffff810b1350>] ? wake_atomic_t_function+0x40/0x40
[14579.036719]  [<ffffffff8114cfc4>] ? filemap_fdatawait_range+0xe4/0x160
[14579.036739]  [<ffffffffa01f6330>] ? btrfs_wait_ordered_range+0x70/0x180 [btrfs]
[14579.036747]  [<ffffffffa021f987>] ? __btrfs_write_out_cache+0x3a7/0x470 [btrfs]
[14579.036755]  [<ffffffffa021fdd8>] ? btrfs_write_out_cache+0xd8/0x110 [btrfs]
[14579.036761]  [<ffffffffa01bafc1>] ? block_group_cache_tree_search+0x51/0xd0 [btrfs]
[14579.036768]  [<ffffffffa01caf2c>] ? btrfs_write_dirty_block_groups+0x54c/0x640 [btrfs]
[14579.036776]  [<ffffffffa01d9a71>] ? commit_cowonly_roots+0x1c1/0x270 [btrfs]
[14579.036783]  [<ffffffffa01dbc31>] ? btrfs_commit_transaction+0x451/0xa50 [btrfs]
[14579.036790]  [<ffffffffa01d9735>] ? transaction_kthread+0x1d5/0x250 [btrfs]
[14579.036796]  [<ffffffffa01d9560>] ? open_ctree+0x1f20/0x1f20 [btrfs]
[14579.036801]  [<ffffffff81090681>] ? kthread+0xc1/0xe0
[14579.036804]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036807]  [<ffffffff8154b358>] ? ret_from_fork+0x58/0x90
[14579.036809]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036818] kworker/u32:10  D ffff88041fcf2ec0     0  2414      2 0x00000000
[14579.036828] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[14579.036829]  ffff88040f25aaa0 0000000000000046 ffff8801509b80c8 ffff88040cea6b20
[14579.036831]  0000000000012ec0 ffff8803d50fbfd8 0000000000012ec0 ffff88040cea6b20
[14579.036832]  0000000000000246 ffff8801ea64f900 ffff88040bc881f0 0000000000000801
[14579.036834] Call Trace:
[14579.036841]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.036843]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.036850]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.036855]  [<ffffffff810a31b5>] ? sched_clock_local+0x15/0x80
[14579.036862]  [<ffffffffa01cb037>] ? delayed_ref_async_start+0x17/0x90 [btrfs]
[14579.036888]  [<ffffffffa020af4e>] ? normal_work_helper+0x6e/0x2f0 [btrfs]
[14579.036891]  [<ffffffff810887dc>] ? process_one_work+0x15c/0x450
[14579.036893]  [<ffffffff81089ce2>] ? worker_thread+0x112/0x510
[14579.036895]  [<ffffffff81089bd0>] ? create_and_start_worker+0x60/0x60
[14579.036897]  [<ffffffff81090681>] ? kthread+0xc1/0xe0
[14579.036899]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036901]  [<ffffffff8154b358>] ? ret_from_fork+0x58/0x90
[14579.036903]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036914] kworker/u32:8   D ffff88041fc12ec0     0  4615      2 0x00000000
[14579.036922] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[14579.036923]  ffff88040ccdcca0 0000000000000046 ffff88040bc88000 ffff8803a5757330
[14579.036925]  0000000000012ec0 ffff88017969bfd8 0000000000012ec0 ffff8803a5757330
[14579.036926]  0000000000000246 ffff8801ea64f900 ffff88040bc881f0 0000000000000801
[14579.036928] Call Trace:
[14579.036944]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.036946]  [<ffffffff810a31b5>] ? sched_clock_local+0x15/0x80
[14579.036952]  [<ffffffffa01cb037>] ? delayed_ref_async_start+0x17/0x90 [btrfs]
[14579.036960]  [<ffffffffa020af4e>] ? normal_work_helper+0x6e/0x2f0 [btrfs]
[14579.036961]  [<ffffffff810887dc>] ? process_one_work+0x15c/0x450
[14579.036963]  [<ffffffff81089ce2>] ? worker_thread+0x112/0x510
[14579.036965]  [<ffffffff81089bd0>] ? create_and_start_worker+0x60/0x60
[14579.036967]  [<ffffffff81090681>] ? kthread+0xc1/0xe0
[14579.036969]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036971]  [<ffffffff8154b358>] ? ret_from_fork+0x58/0x90
[14579.036973]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.036974] kworker/u32:9   D ffff88041fc12ec0     0  4667      2 0x00000000
[14579.036982] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[14579.036983]  ffff8800db857630 0000000000000046 ffff8800d287bfd8 ffff8800db8ca390
[14579.036985]  0000000000012ec0 ffff8800d287bfd8 0000000000012ec0 ffff8800db8ca390
[14579.036986]  0000000000000246 ffff8801ea64f900 ffff880401afe9f0 0000000000000801
[14579.036988] Call Trace:
[14579.036994]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.036996]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037003]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.037010]  [<ffffffffa01e4bf9>] ? btrfs_finish_ordered_io+0x2a9/0x580 [btrfs]
[14579.037014]  [<ffffffff81056caf>] ? kvm_clock_read+0x1f/0x30
[14579.037016]  [<ffffffff810a31b5>] ? sched_clock_local+0x15/0x80
[14579.037023]  [<ffffffffa020af4e>] ? normal_work_helper+0x6e/0x2f0 [btrfs]
[14579.037025]  [<ffffffff810887dc>] ? process_one_work+0x15c/0x450
[14579.037027]  [<ffffffff81089ce2>] ? worker_thread+0x112/0x510
[14579.037028]  [<ffffffff81089bd0>] ? create_and_start_worker+0x60/0x60
[14579.037030]  [<ffffffff81090681>] ? kthread+0xc1/0xe0
[14579.037032]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.037034]  [<ffffffff8154b358>] ? ret_from_fork+0x58/0x90
[14579.037036]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.037038] kworker/u32:13  D ffff88041fcb2ec0     0  4670      2 0x00000000
[14579.037045] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[14579.037046]  ffff8803faa12be0 0000000000000046 ffff88007a467fd8 ffff8800db857630
[14579.037047]  0000000000012ec0 ffff88007a467fd8 0000000000012ec0 ffff8800db857630
[14579.037065]  0000000000000246 ffff8801ea64f900 ffff880401afe9f0 0000000000000801
[14579.037068] Call Trace:
[14579.037083]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.037087]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037101]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.037118]  [<ffffffffa01fab55>] ? end_bio_extent_readpage+0x345/0xaa0 [btrfs]
[14579.037134]  [<ffffffffa01e4bf9>] ? btrfs_finish_ordered_io+0x2a9/0x580 [btrfs]
[14579.037139]  [<ffffffff810a62ed>] ? update_curr+0x10d/0x1b0
[14579.037144]  [<ffffffff810a52b7>] ? pick_next_entity+0x87/0x140
[14579.037159]  [<ffffffffa020af4e>] ? normal_work_helper+0x6e/0x2f0 [btrfs]
[14579.037163]  [<ffffffff810887dc>] ? process_one_work+0x15c/0x450
[14579.037166]  [<ffffffff81089ce2>] ? worker_thread+0x112/0x510
[14579.037169]  [<ffffffff81089bd0>] ? create_and_start_worker+0x60/0x60
[14579.037174]  [<ffffffff81090681>] ? kthread+0xc1/0xe0
[14579.037178]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.037182]  [<ffffffff8154b358>] ? ret_from_fork+0x58/0x90
[14579.037187]  [<ffffffff810905c0>] ? flush_kthread_worker+0xb0/0xb0
[14579.037190] rsync           D ffff88041fc12ec0     0  4701   4698 0x00000000
[14579.037194]  ffffffff81819480 0000000000000086 ffff880252d890d8 ffff88040c3be2d0
[14579.037197]  0000000000012ec0 ffff88009c58ffd8 0000000000012ec0 ffff88040c3be2d0
[14579.037200]  0000000000000246 ffff8801ea64f900 ffff880401afe9f0 0000000000000801
[14579.037203] Call Trace:
[14579.037218]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.037222]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037236]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.037243]  [<ffffffff811c6eab>] ? complete_walk+0x4b/0xd0
[14579.037258]  [<ffffffffa01e43c8>] ? btrfs_dirty_inode+0x58/0xe0 [btrfs]
[14579.037272]  [<ffffffffa01e6b68>] ? btrfs_setattr+0xc8/0x320 [btrfs]
[14579.037282]  [<ffffffff81071d42>] ? current_fs_time+0x12/0x50
[14579.037287]  [<ffffffff811d8c9e>] ? notify_change+0x1fe/0x3e0
[14579.037296]  [<ffffffff811ece87>] ? utimes_common+0xd7/0x1e0
[14579.037301]  [<ffffffff811ed073>] ? do_utimes+0xe3/0x180
[14579.037305]  [<ffffffff811c25f3>] ? SYSC_newlstat+0x23/0x30
[14579.037310]  [<ffffffff811ed1f0>] ? SyS_utimensat+0x60/0x90
[14579.037315]  [<ffffffff8154b40d>] ? system_call_fast_compare_end+0x10/0x15
[14579.037321] rsync           D ffff88041fc32ec0     0  7576   4542 0x00000000
[14579.037324]  ffff88040f1f8a20 0000000000000086 ffff8803a59bdc18 ffff8803faa13530
[14579.037328]  0000000000012ec0 ffff88010566bfd8 0000000000012ec0 ffff8803faa13530
[14579.037331]  0000000000000246 ffff8801ea64f900 ffff88004fc779f0 0000000000000801
[14579.037334] Call Trace:
[14579.037348]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.037352]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037366]  [<ffffffffa01dca40>] ? start_transaction+0x390/0x590 [btrfs]
[14579.037371]  [<ffffffff811c6eab>] ? complete_walk+0x4b/0xd0
[14579.037385]  [<ffffffffa01e43c8>] ? btrfs_dirty_inode+0x58/0xe0 [btrfs]
[14579.037399]  [<ffffffffa01e6b68>] ? btrfs_setattr+0xc8/0x320 [btrfs]
[14579.037404]  [<ffffffff81071d42>] ? current_fs_time+0x12/0x50
[14579.037408]  [<ffffffff811d8c9e>] ? notify_change+0x1fe/0x3e0
[14579.037413]  [<ffffffff811ece87>] ? utimes_common+0xd7/0x1e0
[14579.037418]  [<ffffffff811ed073>] ? do_utimes+0xe3/0x180
[14579.037422]  [<ffffffff811c25f3>] ? SYSC_newlstat+0x23/0x30
[14579.037427]  [<ffffffff811ed1f0>] ? SyS_utimensat+0x60/0x90
[14579.037431]  [<ffffffff8154b40d>] ? system_call_fast_compare_end+0x10/0x15
[14579.037435] rsync           D ffff88041fc52ec0     0  9256   4552 0x00000000
[14579.037439]  ffff88040f1f80d0 0000000000000086 0000000000280000 ffff88037afd3530
[14579.037442]  0000000000012ec0 ffff88037afd7fd8 0000000000012ec0 ffff88037afd3530
[14579.037445]  0000000000000246 ffff8801ea64f900 ffff8801e576a1f0 0000000000000201
[14579.037448] Call Trace:
[14579.037462]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.037466]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037480]  [<ffffffffa01dcade>] ? start_transaction+0x42e/0x590 [btrfs]
[14579.037494]  [<ffffffffa01de181>] ? __unlink_start_trans+0x31/0xe0 [btrfs]
[14579.037508]  [<ffffffffa01e5217>] ? btrfs_unlink+0x37/0xd0 [btrfs]
[14579.037512]  [<ffffffff811ca58d>] ? vfs_unlink+0x10d/0x180
[14579.037572]  [<ffffffffa01d46d9>] ? btree_submit_bio_hook+0xe9/0x120 [btrfs]
[14579.037577]  [<ffffffff8114ced8>] ? wait_on_page_bit+0x78/0x80
[14579.037581]  [<ffffffff810b1350>] ? wake_atomic_t_function+0x40/0x40
[14579.037598]  [<ffffffffa01fdf9a>] ? read_extent_buffer_pages+0x2ca/0x300 [btrfs]
[14579.037614]  [<ffffffffa01d2020>] ? verify_parent_transid+0x210/0x210 [btrfs]
[14579.037628]  [<ffffffffa01d3831>] ? btree_read_extent_buffer_pages.constprop.125+0xb1/0x120 [btrfs]
[14579.037643]  [<ffffffffa01d4921>] ? read_tree_block+0x41/0x70 [btrfs]
[14579.037655]  [<ffffffffa01b4ac5>] ? read_block_for_search.isra.40+0x195/0x3d0 [btrfs]
[14579.037669]  [<ffffffffa01ba741>] ? btrfs_next_old_leaf+0x291/0x4a0 [btrfs]
[14579.037684]  [<ffffffffa024ed17>] ? btrfs_load_inode_props+0xc7/0x3d0 [btrfs]
[14579.037445]  0000000000000246 ffff8801ea64f900 ffff8801e576a1f0 0000000000000201
[14579.037448] Call Trace:
[14579.037462]  [<ffffffffa01db16f>] ? wait_current_trans.isra.33+0x9f/0x100 [btrfs]
[14579.037466]  [<ffffffff810b12e0>] ? __wake_up_sync+0x20/0x20
[14579.037480]  [<ffffffffa01dcade>] ? start_transaction+0x42e/0x590 [btrfs]
[14579.037494]  [<ffffffffa01de181>] ? __unlink_start_trans+0x31/0xe0 [btrfs]
[14579.037508]  [<ffffffffa01e5217>] ? btrfs_unlink+0x37/0xd0 [btrfs]
[14579.037512]  [<ffffffff811ca58d>] ? vfs_unlink+0x10d/0x180
[14579.037515]  [<ffffffff811ca87e>] ? do_unlinkat+0x27e/0x2c0
[14579.037520]  [<ffffffff811c25f3>] ? SYSC_newlstat+0x23/0x30
[14579.037524]  [<ffffffff8154b40d>] ? system_call_fast_compare_end+0x10/0x15
[14579.037529] rsync           D ffff88041fc52ec0     0 12221   4494 0x00000000
[14579.037532]  ffff88040ccdcca0 0000000000000086 0000000000000020 ffff8804086b69a0
[14579.037536]  0000000000012ec0 ffff88006c87bfd8 0000000000012ec0 ffff8804086b69a0
[14579.037539]  ffff880224af5ea0 ffff88041fc53770 ffff8804086b69a0 ffffffff8114cd80
[14579.037542] Call Trace:
[14579.037547]  [<ffffffff8114cd80>] ? __lock_page+0x70/0x70
[14579.037550]  [<ffffffff81547c5c>] ? io_schedule+0x8c/0xd0
[14579.037554]  [<ffffffff8114cd8e>] ? sleep_on_page+0xe/0x20
[14579.037557]  [<ffffffff8154828a>] ? __wait_on_bit+0x5a/0x90
[14579.037572]  [<ffffffffa01d46d9>] ? btree_submit_bio_hook+0xe9/0x120 [btrfs]
[14579.037577]  [<ffffffff8114ced8>] ? wait_on_page_bit+0x78/0x80
[14579.037581]  [<ffffffff810b1350>] ? wake_atomic_t_function+0x40/0x40
[14579.037598]  [<ffffffffa01fdf9a>] ? read_extent_buffer_pages+0x2ca/0x300 [btrfs]
[14579.037614]  [<ffffffffa01d2020>] ? verify_parent_transid+0x210/0x210 [btrfs]
[14579.037628]  [<ffffffffa01d3831>] ? btree_read_extent_buffer_pages.constprop.125+0xb1/0x120 [btrfs]
[14579.037643]  [<ffffffffa01d4921>] ? read_tree_block+0x41/0x70 [btrfs]
[14579.037655]  [<ffffffffa01b4ac5>] ? read_block_for_search.isra.40+0x195/0x3d0 [btrfs]
[14579.037669]  [<ffffffffa01ba741>] ? btrfs_next_old_leaf+0x291/0x4a0 [btrfs]
[14579.037684]  [<ffffffffa024ed17>] ? btrfs_load_inode_props+0xc7/0x3d0 [btrfs]
[14579.037701]  [<ffffffffa01f38f6>] ? btrfs_get_token_64+0x66/0x100 [btrfs]
[14579.037717]  [<ffffffffa01e760c>] ? btrfs_iget+0x17c/0x6f0 [btrfs]
[14579.037731]  [<ffffffffa01e8393>] ? btrfs_lookup_dentry+0x3f3/0x4e0 [btrfs]
[14579.037745]  [<ffffffffa01e848e>] ? btrfs_lookup+0xe/0x40 [btrfs]
[14579.037751]  [<ffffffff811c6bd9>] ? lookup_real+0x19/0x50
[14579.037756]  [<ffffffff811c70f7>] ? __lookup_hash+0x37/0x50
[14579.037762]  [<ffffffff8154341b>] ? lookup_slow+0x41/0xa7
[14579.037765]  [<ffffffff811c999f>] ? path_lookupat+0x74f/0x770
[14579.037778]  [<ffffffffa01b7326>] ? btrfs_search_slot+0x4b6/0xac0 [btrfs]
[14579.037782]  [<ffffffff811c99f4>] ? filename_lookup+0x34/0xd0
[14579.037785]  [<ffffffff811c82b4>] ? getname_flags+0xc4/0x1b0
[14579.037789]  [<ffffffff811cd863>] ? user_path_at_empty+0x63/0xc0
[14579.037793]  [<ffffffff811c2286>] ? cp_new_stat+0x136/0x150
[14579.037798]  [<ffffffff811c2517>] ? vfs_fstatat+0x47/0xa0
[14579.037802]  [<ffffffff811c25e2>] ? SYSC_newlstat+0x12/0x30
[14579.037806]  [<ffffffff8154b40d>] ? system_call_fast_compare_end+0x10/0x15