[čen 1 13:05] INFO: task md1_reclaim:910 blocked for more than 120 seconds.
[  +0,000057]       Not tainted 5.5.0-0.bpo.2-amd64 #1 Debian 5.5.17-1~bpo10+1
[  +0,000033] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  +0,000035] md1_reclaim     D    0   910      2 0x80004000
[  +0,000003] Call Trace:
[  +0,000012]  ? __schedule+0x2db/0x700
[  +0,000004]  ? check_preempt_curr+0x62/0x90
[  +0,000004]  ? wbt_exit+0x30/0x30
[  +0,000001]  ? __wbt_done+0x30/0x30
[  +0,000002]  schedule+0x40/0xb0
[  +0,000002]  io_schedule+0x12/0x40
[  +0,000003]  rq_qos_wait+0xfa/0x170
[  +0,000002]  ? karma_partition+0x210/0x210
[  +0,000002]  ? wbt_exit+0x30/0x30
[  +0,000001]  wbt_wait+0x99/0xe0
[  +0,000002]  __rq_qos_throttle+0x23/0x30
[  +0,000004]  blk_mq_make_request+0x12a/0x5d0
[  +0,000003]  generic_make_request+0xcf/0x310
[  +0,000002]  submit_bio+0x42/0x1c0
[  +0,000010]  ? md_super_write.part.70+0x98/0x120 [md_mod]
[  +0,000007]  md_update_sb.part.71+0x3c0/0x8f0 [md_mod]
[  +0,000008]  r5l_do_reclaim+0x32a/0x3b0 [raid456]
[  +0,000003]  ? schedule_timeout+0x161/0x310
[  +0,000002]  ? prepare_to_wait_event+0xb6/0x140
[  +0,000006]  ? md_register_thread+0xd0/0xd0 [md_mod]
[  +0,000004]  md_thread+0x94/0x150 [md_mod]
[  +0,000002]  ? finish_wait+0x80/0x80
[  +0,000003]  kthread+0x112/0x130
[  +0,000002]  ? kthread_park+0x80/0x80
[  +0,000002]  ret_from_fork+0x22/0x40