ZFS Hang under memory pressure.

gistfile1.txt

[233482.058622] INFO: task txg_sync:566 blocked for more than 120 seconds.
[233482.058779]       Tainted: P           O  3.16.1-1-ARCH #1
[233482.058874] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233482.059008] txg_sync        D 0000000000000000     0   566      2 0x00000000
[233482.059018]  ffff8800ca38bbb0 0000000000000046 ffff8800cf1cbd20 0000000000014580
[233482.059026]  ffff8800ca38bfd8 0000000000014580 ffff8800cf1cbd20 0000000000000046
[233482.059033]  ffff8800ca38bb38 ffffffff810a2aff ffffc90024149920 0000000000000000
[233482.059040] Call Trace:
[233482.059055]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[233482.059064]  [<ffffffff810a2ce2>] ? default_wake_function+0x12/0x20
[233482.059072]  [<ffffffff810b6425>] ? __wake_up_common+0x55/0x90
[233482.059080]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233482.059086]  [<ffffffff8152d014>] io_schedule+0x94/0xf0
[233482.059114]  [<ffffffffa020815c>] cv_wait_common+0xac/0x1b0 [spl]
[233482.059156]  [<ffffffffa0312530>] ? zio_taskq_member.isra.4+0x80/0x80 [zfs]
[233482.059164]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233482.059179]  [<ffffffffa02082b8>] __cv_wait_io+0x18/0x20 [spl]
[233482.059213]  [<ffffffffa03143b3>] zio_wait+0x113/0x1d0 [zfs]
[233482.059254]  [<ffffffffa02a1c41>] dsl_pool_sync+0xc1/0x480 [zfs]
[233482.059298]  [<ffffffffa02ba53d>] spa_sync+0x42d/0xb10 [zfs]
[233482.059307]  [<ffffffff810da768>] ? ktime_get_ts+0x48/0xf0
[233482.059351]  [<ffffffffa02cb252>] txg_sync_thread+0x382/0x5f0 [zfs]
[233482.059397]  [<ffffffffa02caed0>] ? txg_delay+0xf0/0xf0 [zfs]
[233482.059411]  [<ffffffffa02002ca>] thread_generic_wrapper+0x7a/0x90 [spl]
[233482.059424]  [<ffffffffa0200250>] ? __thread_exit+0xa0/0xa0 [spl]
[233482.059432]  [<ffffffff81091cea>] kthread+0xea/0x100
[233482.059439]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233482.059447]  [<ffffffff81530b3c>] ret_from_fork+0x7c/0xb0
[233482.059454]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233842.184806] INFO: task txg_sync:566 blocked for more than 120 seconds.
[233842.184962]       Tainted: P           O  3.16.1-1-ARCH #1
[233842.185057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233842.185191] txg_sync        D 0000000000000000     0   566      2 0x00000000
[233842.185201]  ffff8800ca38bbb0 0000000000000046 ffff8800cf1cbd20 0000000000014580
[233842.185209]  ffff8800ca38bfd8 0000000000014580 ffff8800cf1cbd20 0000000000000046
[233842.185216]  ffff8800ca38bb38 ffffffff810a2aff ffffc900178571c0 0000000000000000
[233842.185223] Call Trace:
[233842.185239]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[233842.185248]  [<ffffffff810a2ce2>] ? default_wake_function+0x12/0x20
[233842.185256]  [<ffffffff810b6425>] ? __wake_up_common+0x55/0x90
[233842.185264]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233842.185271]  [<ffffffff8152d014>] io_schedule+0x94/0xf0
[233842.185299]  [<ffffffffa020815c>] cv_wait_common+0xac/0x1b0 [spl]
[233842.185341]  [<ffffffffa0312530>] ? zio_taskq_member.isra.4+0x80/0x80 [zfs]
[233842.185348]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233842.185363]  [<ffffffffa02082b8>] __cv_wait_io+0x18/0x20 [spl]
[233842.185397]  [<ffffffffa03143b3>] zio_wait+0x113/0x1d0 [zfs]
[233842.185438]  [<ffffffffa02a1c41>] dsl_pool_sync+0xc1/0x480 [zfs]
[233842.185482]  [<ffffffffa02ba53d>] spa_sync+0x42d/0xb10 [zfs]
[233842.185491]  [<ffffffff810da768>] ? ktime_get_ts+0x48/0xf0
[233842.185535]  [<ffffffffa02cb252>] txg_sync_thread+0x382/0x5f0 [zfs]
[233842.185581]  [<ffffffffa02caed0>] ? txg_delay+0xf0/0xf0 [zfs]
[233842.185596]  [<ffffffffa02002ca>] thread_generic_wrapper+0x7a/0x90 [spl]
[233842.185608]  [<ffffffffa0200250>] ? __thread_exit+0xa0/0xa0 [spl]
[233842.185616]  [<ffffffff81091cea>] kthread+0xea/0x100
[233842.185624]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233842.185632]  [<ffffffff81530b3c>] ret_from_fork+0x7c/0xb0
[233842.185639]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233842.185650] INFO: task java:1106 blocked for more than 120 seconds.
[233842.185793]       Tainted: P           O  3.16.1-1-ARCH #1
[233842.185887] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233842.186019] java            D 0000000000000000     0  1106    641 0x00000000
[233842.186026]  ffff8800b193bb68 0000000000000082 ffff88021e241e90 0000000000014580
[233842.186033]  ffff8800b193bfd8 0000000000014580 ffff88021e241e90 0000000000000000
[233842.186040]  0000000000000002 ffff8800b193bab8 ffffffff8152d0ab ffff8800cd453a00
[233842.186046] Call Trace:
[233842.186053]  [<ffffffff8152d0ab>] ? preempt_schedule+0x3b/0x60
[233842.186062]  [<ffffffff8101f936>] ? ___preempt_schedule+0x56/0xb0
[233842.186071]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233842.186084]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[233842.186090]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233842.186103]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[233842.186146]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[233842.186182]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[233842.186217]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[233842.186256]  [<ffffffffa02ff2ed>] zfs_dirty_inode+0xad/0x2b0 [zfs]
[233842.186269]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233842.186304]  [<ffffffffa030be68>] ? zfs_tstamp_update_setup+0x38/0x1c0 [zfs]
[233842.186342]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[233842.186355]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233842.186388]  [<ffffffffa031b52e>] zpl_dirty_inode+0xe/0x10 [zfs]
[233842.186396]  [<ffffffff811ecfd8>] __mark_inode_dirty+0x38/0x2d0
[233842.186429]  [<ffffffffa0319e67>] zpl_release+0x37/0x70 [zfs]
[233842.186438]  [<ffffffff811c3bdc>] __fput+0x9c/0x200
[233842.186446]  [<ffffffff811c3d8e>] ____fput+0xe/0x10
[233842.186452]  [<ffffffff8108ec1f>] task_work_run+0x9f/0xe0
[233842.186461]  [<ffffffff81014d65>] do_notify_resume+0x95/0xa0
[233842.186468]  [<ffffffff81530e20>] int_signal+0x12/0x17
[233842.186484] INFO: task rsync:2504 blocked for more than 120 seconds.
[233842.186624]       Tainted: P           O  3.16.1-1-ARCH #1
[233842.186718] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233842.186849] rsync           D 0000000000000000     0  2504   2503 0x00000000
[233842.186856]  ffff8800a9f2fac0 0000000000000082 ffff88022437d180 0000000000014580
[233842.186862]  ffff8800a9f2ffd8 0000000000014580 ffff88022437d180 0000000000000001
[233842.186868]  ffff8800a9f2fa30 ffffffff8109c83e 000000002fc94580 ffff8800cf1cb2f0
[233842.186875] Call Trace:
[233842.186883]  [<ffffffff8109c83e>] ? ttwu_stat+0x9e/0x110
[233842.186890]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[233842.186896]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233842.186910]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[233842.186916]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233842.186929]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[233842.186972]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[233842.187007]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[233842.187041]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[233842.187079]  [<ffffffffa0305649>] zfs_write+0x3f9/0xc30 [zfs]
[233842.187094]  [<ffffffffa01fb6ab>] ? kmem_free_debug+0x4b/0x150 [spl]
[233842.187106]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233842.187142]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[233842.187177]  [<ffffffffa031a541>] zpl_write_common+0x61/0xb0 [zfs]
[233842.187210]  [<ffffffffa031a5f0>] zpl_write+0x60/0x90 [zfs]
[233842.187218]  [<ffffffff811c1f87>] vfs_write+0xb7/0x200
[233842.187225]  [<ffffffff811c1e9c>] ? vfs_read+0x13c/0x170
[233842.187232]  [<ffffffff811c2bf9>] SyS_write+0x59/0xd0
[233842.187240]  [<ffffffff81530be9>] system_call_fastpath+0x16/0x1b
[233962.226897] INFO: task txg_sync:566 blocked for more than 120 seconds.
[233962.227057]       Tainted: P           O  3.16.1-1-ARCH #1
[233962.227152] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233962.227285] txg_sync        D 0000000000000000     0   566      2 0x00000000
[233962.227295]  ffff8800ca38bbb0 0000000000000046 ffff8800cf1cbd20 0000000000014580
[233962.227303]  ffff8800ca38bfd8 0000000000014580 ffff8800cf1cbd20 0000000000000046
[233962.227310]  ffff8800ca38bb38 ffffffff810a2aff ffffc900178571c0 0000000000000000
[233962.227317] Call Trace:
[233962.227333]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[233962.227342]  [<ffffffff810a2ce2>] ? default_wake_function+0x12/0x20
[233962.227350]  [<ffffffff810b6425>] ? __wake_up_common+0x55/0x90
[233962.227359]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233962.227365]  [<ffffffff8152d014>] io_schedule+0x94/0xf0
[233962.227393]  [<ffffffffa020815c>] cv_wait_common+0xac/0x1b0 [spl]
[233962.227435]  [<ffffffffa0312530>] ? zio_taskq_member.isra.4+0x80/0x80 [zfs]
[233962.227442]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233962.227457]  [<ffffffffa02082b8>] __cv_wait_io+0x18/0x20 [spl]
[233962.227491]  [<ffffffffa03143b3>] zio_wait+0x113/0x1d0 [zfs]
[233962.227533]  [<ffffffffa02a1c41>] dsl_pool_sync+0xc1/0x480 [zfs]
[233962.227577]  [<ffffffffa02ba53d>] spa_sync+0x42d/0xb10 [zfs]
[233962.227586]  [<ffffffff810da768>] ? ktime_get_ts+0x48/0xf0
[233962.227630]  [<ffffffffa02cb252>] txg_sync_thread+0x382/0x5f0 [zfs]
[233962.227676]  [<ffffffffa02caed0>] ? txg_delay+0xf0/0xf0 [zfs]
[233962.227691]  [<ffffffffa02002ca>] thread_generic_wrapper+0x7a/0x90 [spl]
[233962.227703]  [<ffffffffa0200250>] ? __thread_exit+0xa0/0xa0 [spl]
[233962.227711]  [<ffffffff81091cea>] kthread+0xea/0x100
[233962.227719]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233962.227727]  [<ffffffff81530b3c>] ret_from_fork+0x7c/0xb0
[233962.227734]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[233962.227745] INFO: task java:1106 blocked for more than 120 seconds.
[233962.227887]       Tainted: P           O  3.16.1-1-ARCH #1
[233962.227981] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233962.228122] java            D 0000000000000000     0  1106    641 0x00000000
[233962.228130]  ffff8800b193bb68 0000000000000082 ffff88021e241e90 0000000000014580
[233962.228137]  ffff8800b193bfd8 0000000000014580 ffff88021e241e90 0000000000000000
[233962.228143]  0000000000000002 ffff8800b193bab8 ffffffff8152d0ab ffff8800cd453a00
[233962.228150] Call Trace:
[233962.228157]  [<ffffffff8152d0ab>] ? preempt_schedule+0x3b/0x60
[233962.228166]  [<ffffffff8101f936>] ? ___preempt_schedule+0x56/0xb0
[233962.228175]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233962.228188]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[233962.228195]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233962.228208]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[233962.228250]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[233962.228286]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[233962.228321]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[233962.228360]  [<ffffffffa02ff2ed>] zfs_dirty_inode+0xad/0x2b0 [zfs]
[233962.228374]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233962.228408]  [<ffffffffa030be68>] ? zfs_tstamp_update_setup+0x38/0x1c0 [zfs]
[233962.228446]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[233962.228459]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233962.228492]  [<ffffffffa031b52e>] zpl_dirty_inode+0xe/0x10 [zfs]
[233962.228500]  [<ffffffff811ecfd8>] __mark_inode_dirty+0x38/0x2d0
[233962.228533]  [<ffffffffa0319e67>] zpl_release+0x37/0x70 [zfs]
[233962.228542]  [<ffffffff811c3bdc>] __fput+0x9c/0x200
[233962.228550]  [<ffffffff811c3d8e>] ____fput+0xe/0x10
[233962.228556]  [<ffffffff8108ec1f>] task_work_run+0x9f/0xe0
[233962.228565]  [<ffffffff81014d65>] do_notify_resume+0x95/0xa0
[233962.228572]  [<ffffffff81530e20>] int_signal+0x12/0x17
[233962.228588] INFO: task rsync:2504 blocked for more than 120 seconds.
[233962.228726]       Tainted: P           O  3.16.1-1-ARCH #1
[233962.228820] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[233962.228951] rsync           D 0000000000000000     0  2504   2503 0x00000000
[233962.228958]  ffff8800a9f2fac0 0000000000000082 ffff88022437d180 0000000000014580
[233962.228965]  ffff8800a9f2ffd8 0000000000014580 ffff88022437d180 0000000000000001
[233962.228971]  ffff8800a9f2fa30 ffffffff8109c83e 000000002fc94580 ffff8800cf1cb2f0
[233962.228977] Call Trace:
[233962.228985]  [<ffffffff8109c83e>] ? ttwu_stat+0x9e/0x110
[233962.228992]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[233962.228998]  [<ffffffff8152cd39>] schedule+0x29/0x70
[233962.229012]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[233962.229019]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[233962.229032]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[233962.229074]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[233962.229110]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[233962.229144]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[233962.229181]  [<ffffffffa0305649>] zfs_write+0x3f9/0xc30 [zfs]
[233962.229196]  [<ffffffffa01fb6ab>] ? kmem_free_debug+0x4b/0x150 [spl]
[233962.229209]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[233962.229245]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[233962.229279]  [<ffffffffa031a541>] zpl_write_common+0x61/0xb0 [zfs]
[233962.229313]  [<ffffffffa031a5f0>] zpl_write+0x60/0x90 [zfs]
[233962.229321]  [<ffffffff811c1f87>] vfs_write+0xb7/0x200
[233962.229327]  [<ffffffff811c1e9c>] ? vfs_read+0x13c/0x170
[233962.229335]  [<ffffffff811c2bf9>] SyS_write+0x59/0xd0
[233962.229342]  [<ffffffff81530be9>] system_call_fastpath+0x16/0x1b
[234082.268967] INFO: task txg_sync:566 blocked for more than 120 seconds.
[234082.269128]       Tainted: P           O  3.16.1-1-ARCH #1
[234082.269223] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[234082.269357] txg_sync        D 0000000000000000     0   566      2 0x00000000
[234082.269367]  ffff8800ca38bbb0 0000000000000046 ffff8800cf1cbd20 0000000000014580
[234082.269375]  ffff8800ca38bfd8 0000000000014580 ffff8800cf1cbd20 0000000000000046
[234082.269382]  ffff8800ca38bb38 ffffffff810a2aff ffffc900178571c0 0000000000000000
[234082.269389] Call Trace:
[234082.269405]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[234082.269414]  [<ffffffff810a2ce2>] ? default_wake_function+0x12/0x20
[234082.269422]  [<ffffffff810b6425>] ? __wake_up_common+0x55/0x90
[234082.269430]  [<ffffffff8152cd39>] schedule+0x29/0x70
[234082.269436]  [<ffffffff8152d014>] io_schedule+0x94/0xf0
[234082.269465]  [<ffffffffa020815c>] cv_wait_common+0xac/0x1b0 [spl]
[234082.269507]  [<ffffffffa0312530>] ? zio_taskq_member.isra.4+0x80/0x80 [zfs]
[234082.269514]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[234082.269529]  [<ffffffffa02082b8>] __cv_wait_io+0x18/0x20 [spl]
[234082.269563]  [<ffffffffa03143b3>] zio_wait+0x113/0x1d0 [zfs]
[234082.269604]  [<ffffffffa02a1c41>] dsl_pool_sync+0xc1/0x480 [zfs]
[234082.269648]  [<ffffffffa02ba53d>] spa_sync+0x42d/0xb10 [zfs]
[234082.269658]  [<ffffffff810da768>] ? ktime_get_ts+0x48/0xf0
[234082.269701]  [<ffffffffa02cb252>] txg_sync_thread+0x382/0x5f0 [zfs]
[234082.269747]  [<ffffffffa02caed0>] ? txg_delay+0xf0/0xf0 [zfs]
[234082.269762]  [<ffffffffa02002ca>] thread_generic_wrapper+0x7a/0x90 [spl]
[234082.269774]  [<ffffffffa0200250>] ? __thread_exit+0xa0/0xa0 [spl]
[234082.269782]  [<ffffffff81091cea>] kthread+0xea/0x100
[234082.269790]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[234082.269798]  [<ffffffff81530b3c>] ret_from_fork+0x7c/0xb0
[234082.269805]  [<ffffffff81091c00>] ? kthread_create_on_node+0x1b0/0x1b0
[234082.269816] INFO: task java:1106 blocked for more than 120 seconds.
[234082.269959]       Tainted: P           O  3.16.1-1-ARCH #1
[234082.270053] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[234082.270185] java            D 0000000000000000     0  1106    641 0x00000000
[234082.270192]  ffff8800b193bb68 0000000000000082 ffff88021e241e90 0000000000014580
[234082.270199]  ffff8800b193bfd8 0000000000014580 ffff88021e241e90 0000000000000000
[234082.270205]  0000000000000002 ffff8800b193bab8 ffffffff8152d0ab ffff8800cd453a00
[234082.270212] Call Trace:
[234082.270219]  [<ffffffff8152d0ab>] ? preempt_schedule+0x3b/0x60
[234082.270227]  [<ffffffff8101f936>] ? ___preempt_schedule+0x56/0xb0
[234082.270236]  [<ffffffff8152cd39>] schedule+0x29/0x70
[234082.270249]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[234082.270255]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[234082.270268]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[234082.270310]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[234082.270347]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[234082.270381]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[234082.270420]  [<ffffffffa02ff2ed>] zfs_dirty_inode+0xad/0x2b0 [zfs]
[234082.270434]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[234082.270468]  [<ffffffffa030be68>] ? zfs_tstamp_update_setup+0x38/0x1c0 [zfs]
[234082.270506]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[234082.270519]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[234082.270552]  [<ffffffffa031b52e>] zpl_dirty_inode+0xe/0x10 [zfs]
[234082.270560]  [<ffffffff811ecfd8>] __mark_inode_dirty+0x38/0x2d0
[234082.270593]  [<ffffffffa0319e67>] zpl_release+0x37/0x70 [zfs]
[234082.270602]  [<ffffffff811c3bdc>] __fput+0x9c/0x200
[234082.270610]  [<ffffffff811c3d8e>] ____fput+0xe/0x10
[234082.270616]  [<ffffffff8108ec1f>] task_work_run+0x9f/0xe0
[234082.270625]  [<ffffffff81014d65>] do_notify_resume+0x95/0xa0
[234082.270632]  [<ffffffff81530e20>] int_signal+0x12/0x17
[234082.270648] INFO: task rsync:2504 blocked for more than 120 seconds.
[234082.270789]       Tainted: P           O  3.16.1-1-ARCH #1
[234082.270883] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[234082.271015] rsync           D 0000000000000000     0  2504   2503 0x00000000
[234082.271021]  ffff8800a9f2fac0 0000000000000082 ffff88022437d180 0000000000014580
[234082.271028]  ffff8800a9f2ffd8 0000000000014580 ffff88022437d180 0000000000000001
[234082.271034]  ffff8800a9f2fa30 ffffffff8109c83e 000000002fc94580 ffff8800cf1cb2f0
[234082.271040] Call Trace:
[234082.271049]  [<ffffffff8109c83e>] ? ttwu_stat+0x9e/0x110
[234082.271055]  [<ffffffff810a2aff>] ? try_to_wake_up+0x1ff/0x380
[234082.271062]  [<ffffffff8152cd39>] schedule+0x29/0x70
[234082.271075]  [<ffffffffa02081d5>] cv_wait_common+0x125/0x1b0 [spl]
[234082.271082]  [<ffffffff810b6b30>] ? __wake_up_sync+0x20/0x20
[234082.271095]  [<ffffffffa0208275>] __cv_wait+0x15/0x20 [spl]
[234082.271137]  [<ffffffffa02cac9b>] txg_wait_open+0x8b/0x110 [zfs]
[234082.271172]  [<ffffffffa028d9d1>] dmu_tx_wait+0x2a1/0x2b0 [zfs]
[234082.271207]  [<ffffffffa028da6a>] dmu_tx_assign+0x8a/0x450 [zfs]
[234082.271244]  [<ffffffffa0305649>] zfs_write+0x3f9/0xc30 [zfs]
[234082.271259]  [<ffffffffa01fb6ab>] ? kmem_free_debug+0x4b/0x150 [spl]
[234082.271271]  [<ffffffffa020ac5a>] ? tsd_exit+0x29a/0x2d0 [spl]
[234082.271307]  [<ffffffffa02ff15f>] ? zfs_read+0x3bf/0x4a0 [zfs]
[234082.271342]  [<ffffffffa031a541>] zpl_write_common+0x61/0xb0 [zfs]
[234082.271375]  [<ffffffffa031a5f0>] zpl_write+0x60/0x90 [zfs]
[234082.271383]  [<ffffffff811c1f87>] vfs_write+0xb7/0x200
[234082.271390]  [<ffffffff811c1e9c>] ? vfs_read+0x13c/0x170
[234082.271397]  [<ffffffff811c2bf9>] SyS_write+0x59/0xd0
[234082.271405]  [<ffffffff81530be9>] system_call_fastpath+0x16/0x1b