[  308.879795] BTRFS info (device dm-7): use lzo compression
[  308.879806] BTRFS info (device dm-7): force clearing of disk cache
[  308.879809] BTRFS info (device dm-7): disk space caching is enabled
[  600.464303] INFO: task btrfs-transacti:1868 blocked for more than 120 seconds.
[  600.465581]       Not tainted 4.7.2-1-ARCH #1
[  600.466761] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  600.468248] btrfs-transacti D ffff88045550bdf8     0  1868      2 0x00000000
[  600.468252]  ffff88045550bdf8 00ff88045550be10 ffff8804664ca700 ffff88045a942700
[  600.468254]  ffff88046bc6c000 ffff88045550c000 ffff8804558b2000 ffff88045e5781f0
[  600.468256]  ffff880464bc6800 ffff88045550be28 ffff88045550be10 ffffffff815daacc
[  600.468257] Call Trace:
[  600.468266]  [<ffffffff815daacc>] schedule+0x3c/0x90
[  600.468292]  [<ffffffffa0674a20>] btrfs_commit_transaction+0x3c0/0xae0 [btrfs]
[  600.468296]  [<ffffffff810bcc80>] ? wake_atomic_t_function+0x60/0x60
[  600.468311]  [<ffffffffa066f4ba>] transaction_kthread+0x1ca/0x1f0 [btrfs]
[  600.468326]  [<ffffffffa066f2f0>] ? btrfs_cleanup_transaction+0x5a0/0x5a0 [btrfs]
[  600.468329]  [<ffffffff81099598>] kthread+0xd8/0xf0
[  600.468332]  [<ffffffff815de9bf>] ret_from_fork+0x1f/0x40
[  600.468334]  [<ffffffff810994c0>] ? kthread_worker_fn+0x170/0x170
[  720.467708] INFO: task btrfs-transacti:1868 blocked for more than 120 seconds.
[  720.469077]       Not tainted 4.7.2-1-ARCH #1
[  720.470355] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  720.471920] btrfs-transacti D ffff88045550bdf8     0  1868      2 0x00000000
[  720.471923]  ffff88045550bdf8 00ff88045550be10 ffff8804664ca700 ffff88045a942700
[  720.471925]  ffff88046bc6c000 ffff88045550c000 ffff8804558b2000 ffff88045e5781f0
[  720.471928]  ffff880464bc6800 ffff88045550be28 ffff88045550be10 ffffffff815daacc
[  720.471928] Call Trace:
[  720.471937]  [<ffffffff815daacc>] schedule+0x3c/0x90
[  720.471996]  [<ffffffffa0674a20>] btrfs_commit_transaction+0x3c0/0xae0 [btrfs]
[  720.472000]  [<ffffffff810bcc80>] ? wake_atomic_t_function+0x60/0x60
[  720.472016]  [<ffffffffa066f4ba>] transaction_kthread+0x1ca/0x1f0 [btrfs]
[  720.472030]  [<ffffffffa066f2f0>] ? btrfs_cleanup_transaction+0x5a0/0x5a0 [btrfs]
[  720.472035]  [<ffffffff81099598>] kthread+0xd8/0xf0
[  720.472038]  [<ffffffff815de9bf>] ret_from_fork+0x1f/0x40
[  720.472041]  [<ffffffff810994c0>] ? kthread_worker_fn+0x170/0x170
[  840.471017] INFO: task btrfs-transacti:1868 blocked for more than 120 seconds.
[  840.472668]       Not tainted 4.7.2-1-ARCH #1
[  840.474487] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  840.474492] btrfs-transacti D ffff88045550bdf8     0  1868      2 0x00000000
[  840.474496]  ffff88045550bdf8 00ff88045550be10 ffff8804664ca700 ffff88045a942700
[  840.474498]  ffff88046bc6c000 ffff88045550c000 ffff8804558b2000 ffff88045e5781f0
[  840.474500]  ffff880464bc6800 ffff88045550be28 ffff88045550be10 ffffffff815daacc
[  840.474501] Call Trace:
[  840.474510]  [<ffffffff815daacc>] schedule+0x3c/0x90
[  840.474536]  [<ffffffffa0674a20>] btrfs_commit_transaction+0x3c0/0xae0 [btrfs]
[  840.474540]  [<ffffffff810bcc80>] ? wake_atomic_t_function+0x60/0x60
[  840.474555]  [<ffffffffa066f4ba>] transaction_kthread+0x1ca/0x1f0 [btrfs]
[  840.474570]  [<ffffffffa066f2f0>] ? btrfs_cleanup_transaction+0x5a0/0x5a0 [btrfs]
[  840.474573]  [<ffffffff81099598>] kthread+0xd8/0xf0
[  840.474576]  [<ffffffff815de9bf>] ret_from_fork+0x1f/0x40
[  840.474579]  [<ffffffff810994c0>] ? kthread_worker_fn+0x170/0x170