apport information

** Attachment added: "ProcCpuinfo.txt"
   
https://bugs.launchpad.net/bugs/1942935/+attachment/5526034/+files/ProcCpuinfo.txt

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https://bugs.launchpad.net/bugs/1942935

Title:
  kernel io hangs during mdcheck/resync

Status in linux package in Ubuntu:
  Confirmed
Status in linux-signed-hwe-5.11 package in Ubuntu:
  Confirmed

Bug description:
  It seems to always occur during an mdcheck/resync, if I am logged in
  via SSH it is still somewhat responsive and basic utilities like dmesg
  will work.  But it apppears any write I/O will hang the terminal and
  nothing is written to syslog (presumably because it is blocked).

  Below is output of dmesg and cat /proc/mdstat, it appears the data
  check was interrupted and /proc/mdstat still shows progress, and a
  whole slew of hung tasks including md1_resync itself.

  [756484.534293] md: data-check of RAID array md0
  [756484.628039] md: delaying data-check of md1 until md0 has finished (they 
share one or more physical units)
  [756493.808773] md: md0: data-check done.
  [756493.829760] md: data-check of RAID array md1
  [778112.446410] md: md1: data-check interrupted.
  [810654.608102] md: data-check of RAID array md1
  [832291.201064] md: md1: data-check interrupted.
  [899745.389485] md: data-check of RAID array md1
  [921395.835305] md: md1: data-check interrupted.
  [921588.558834] INFO: task systemd-journal:376 blocked for more than 120 
seconds.
  [921588.558846]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921588.558850] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921588.558854] task:systemd-journal state:D stack:    0 pid:  376 ppid:     
1 flags:0x00000220
  [921588.558859] Call Trace:
  [921588.558864]  __schedule+0x44c/0x8a0
  [921588.558872]  schedule+0x4f/0xc0
  [921588.558876]  md_write_start+0x150/0x240
  [921588.558880]  ? wait_woken+0x80/0x80
  [921588.558886]  raid5_make_request+0x88/0x890 [raid456]
  [921588.558898]  ? wait_woken+0x80/0x80
  [921588.558901]  ? mempool_kmalloc+0x17/0x20
  [921588.558904]  md_handle_request+0x12d/0x1a0
  [921588.558907]  ? __part_start_io_acct+0x51/0xf0
  [921588.558912]  md_submit_bio+0xca/0x100
  [921588.558915]  submit_bio_noacct+0x112/0x4f0
  [921588.558918]  ? ext4_fc_reserve_space+0x110/0x230
  [921588.558922]  submit_bio+0x51/0x1a0
  [921588.558925]  ? _cond_resched+0x19/0x30
  [921588.558928]  ? kmem_cache_alloc+0x38e/0x440
  [921588.558932]  ? ext4_init_io_end+0x1f/0x50
  [921588.558936]  ext4_io_submit+0x4d/0x60
  [921588.558940]  ext4_writepages+0x2c6/0xcd0
  [921588.558944]  do_writepages+0x43/0xd0
  [921588.558948]  ? do_writepages+0x43/0xd0
  [921588.558951]  ? fault_dirty_shared_page+0xa5/0x110
  [921588.558955]  __filemap_fdatawrite_range+0xcc/0x110
  [921588.558960]  file_write_and_wait_range+0x74/0xc0
  [921588.558962]  ext4_sync_file+0xf5/0x350
  [921588.558967]  vfs_fsync_range+0x49/0x80
  [921588.558970]  do_fsync+0x3d/0x70
  [921588.558973]  __x64_sys_fsync+0x14/0x20
  [921588.558976]  do_syscall_64+0x38/0x90
  [921588.558980]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921588.558984] RIP: 0033:0x7f4c97ee832b
  [921588.558987] RSP: 002b:00007ffdceb29e50 EFLAGS: 00000293 ORIG_RAX: 
000000000000004a
  [921588.558991] RAX: ffffffffffffffda RBX: 000055ced34b0fa0 RCX: 
00007f4c97ee832b
  [921588.558993] RDX: 00007f4c97fc8000 RSI: 000055ced3487b70 RDI: 
0000000000000021
  [921588.558995] RBP: 0000000000000001 R08: 0000000000000000 R09: 
00007ffdceb29fa8
  [921588.558996] R10: 00007f4c97d2c848 R11: 0000000000000293 R12: 
00007ffdceb29fa8
  [921588.558998] R13: 00007ffdceb29fa0 R14: 000055ced34b0fa0 R15: 
000055ced34bcf90
  [921588.559014] INFO: task mysqld:1505 blocked for more than 120 seconds.
  [921588.559018]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921588.559022] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921588.559025] task:mysqld          state:D stack:    0 pid: 1505 ppid:     
1 flags:0x00000000
  [921588.559030] Call Trace:
  [921588.559032]  __schedule+0x44c/0x8a0
  [921588.559036]  schedule+0x4f/0xc0
  [921588.559040]  md_write_start+0x150/0x240
  [921588.559044]  ? wait_woken+0x80/0x80
  [921588.559047]  raid5_make_request+0x88/0x890 [raid456]
  [921588.559056]  ? wait_woken+0x80/0x80
  [921588.559059]  ? mempool_kmalloc+0x17/0x20
  [921588.559062]  md_handle_request+0x12d/0x1a0
  [921588.559065]  ? __part_start_io_acct+0x51/0xf0
  [921588.559068]  md_submit_bio+0xca/0x100
  [921588.559071]  submit_bio_noacct+0x112/0x4f0
  [921588.559075]  submit_bio+0x51/0x1a0
  [921588.559077]  ? _cond_resched+0x19/0x30
  [921588.559081]  ? kmem_cache_alloc+0x38e/0x440
  [921588.559084]  ? ext4_init_io_end+0x1f/0x50
  [921588.559088]  ext4_io_submit+0x4d/0x60
  [921588.559091]  ext4_writepages+0x2c6/0xcd0
  [921588.559094]  ? __schedule+0x454/0x8a0
  [921588.559097]  ? hrtimer_start_range_ns+0x1aa/0x2f0
  [921588.559100]  ? timerqueue_del+0x24/0x50
  [921588.559105]  ? futex_wait+0x1ed/0x270
  [921588.559109]  do_writepages+0x43/0xd0
  [921588.559112]  ? do_writepages+0x43/0xd0
  [921588.559115]  ? futex_wake+0x7c/0x180
  [921588.559118]  __filemap_fdatawrite_range+0xcc/0x110
  [921588.559123]  file_write_and_wait_range+0x74/0xc0
  [921588.559126]  ext4_sync_file+0xf5/0x350
  [921588.559129]  vfs_fsync_range+0x49/0x80
  [921588.559132]  ? __fget_light+0x62/0x80
  [921588.559136]  do_fsync+0x3d/0x70
  [921588.559139]  __x64_sys_fsync+0x14/0x20
  [921588.559142]  do_syscall_64+0x38/0x90
  [921588.559145]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921588.559148] RIP: 0033:0x7f36188d48db
  [921588.559150] RSP: 002b:00007f35f05487d0 EFLAGS: 00000293 ORIG_RAX: 
000000000000004a
  [921588.559154] RAX: ffffffffffffffda RBX: 00007f360502bf50 RCX: 
00007f36188d48db
  [921588.559156] RDX: 000d239200000000 RSI: 0000000000000000 RDI: 
000000000000000a
  [921588.559158] RBP: 00007f35f0548a00 R08: 0000000000000000 R09: 
00007f360502beb0
  [921588.559160] R10: 00007f35f0548ccf R11: 0000000000000293 R12: 
00007f36042e9610
  [921588.559162] R13: 000000000000000a R14: 0000000000000b00 R15: 
0000000000000000
  [921588.559175] INFO: task mdcheck:40625 blocked for more than 120 seconds.
  [921588.559179]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921588.559182] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921588.559185] task:mdcheck         state:D stack:    0 pid:40625 ppid:     
1 flags:0x00000000
  [921588.559189] Call Trace:
  [921588.559191]  __schedule+0x44c/0x8a0
  [921588.559196]  schedule+0x4f/0xc0
  [921588.559200]  schedule_timeout+0x202/0x290
  [921588.559203]  ? do_truncate+0x78/0xd0
  [921588.559216]  ? try_to_wake_up+0x66/0x5c0
  [921588.559220]  wait_for_completion+0x94/0x100
  [921588.559225]  kthread_stop+0x71/0x170
  [921588.559229]  md_unregister_thread+0x47/0x80
  [921588.559232]  md_reap_sync_thread+0x24/0x200
  [921588.559236]  action_store+0x160/0x2e0
  [921588.559239]  md_attr_store+0x82/0xc0
  [921588.559243]  sysfs_kf_write+0x3e/0x50
  [921588.559246]  kernfs_fop_write_iter+0x138/0x1c0
  [921588.559249]  new_sync_write+0x117/0x1b0
  [921588.559254]  vfs_write+0x1ca/0x280
  [921588.559257]  ksys_write+0x67/0xe0
  [921588.559260]  __x64_sys_write+0x1a/0x20
  [921588.559264]  do_syscall_64+0x38/0x90
  [921588.559267]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921588.559271] RIP: 0033:0x7f8c6d2791e7
  [921588.559273] RSP: 002b:00007ffea5d97178 EFLAGS: 00000246 ORIG_RAX: 
0000000000000001
  [921588.559276] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 
00007f8c6d2791e7
  [921588.559278] RDX: 0000000000000005 RSI: 000055b618a3eb40 RDI: 
0000000000000001
  [921588.559280] RBP: 000055b618a3eb40 R08: 000000000000000a R09: 
0000000000000004
  [921588.559282] R10: 000055b616e97017 R11: 0000000000000246 R12: 
0000000000000005
  [921588.559284] R13: 00007f8c6d3546a0 R14: 00007f8c6d3554a0 R15: 
00007f8c6d3548a0
  [921588.559287] INFO: task md1_resync:40644 blocked for more than 120 seconds.
  [921588.559291]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921588.559294] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921588.559297] task:md1_resync      state:D stack:    0 pid:40644 ppid:     
2 flags:0x00004000
  [921588.559301] Call Trace:
  [921588.559303]  __schedule+0x44c/0x8a0
  [921588.559308]  schedule+0x4f/0xc0
  [921588.559311]  md_do_sync.cold+0x8b7/0x953
  [921588.559315]  ? wait_woken+0x80/0x80
  [921588.559319]  ? kernel_sigaction+0x3b/0xd0
  [921588.559323]  md_thread+0xb1/0x170
  [921588.559326]  kthread+0x114/0x150
  [921588.559329]  ? md_start_sync+0x60/0x60
  [921588.559332]  ? kthread_park+0x90/0x90
  [921588.559335]  ret_from_fork+0x22/0x30
  [921588.559341] INFO: task kworker/u16:0:41409 blocked for more than 120 
seconds.
  [921588.559345]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921588.559348] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921588.559353] task:kworker/u16:0   state:D stack:    0 pid:41409 ppid:     
2 flags:0x00004000
  [921588.559357] Workqueue: writeback wb_workfn (flush-253:1)
  [921588.559361] Call Trace:
  [921588.559363]  __schedule+0x44c/0x8a0
  [921588.559367]  schedule+0x4f/0xc0
  [921588.559371]  md_write_start+0x150/0x240
  [921588.559375]  ? wait_woken+0x80/0x80
  [921588.559378]  raid5_make_request+0x88/0x890 [raid456]
  [921588.559387]  ? wait_woken+0x80/0x80
  [921588.559390]  ? mempool_kmalloc+0x17/0x20
  [921588.559393]  md_handle_request+0x12d/0x1a0
  [921588.559396]  ? __part_start_io_acct+0x51/0xf0
  [921588.559399]  md_submit_bio+0xca/0x100
  [921588.559402]  submit_bio_noacct+0x112/0x4f0
  [921588.559405]  submit_bio+0x51/0x1a0
  [921588.559408]  ? _cond_resched+0x19/0x30
  [921588.559412]  ? kmem_cache_alloc+0x38e/0x440
  [921588.559415]  ? ext4_init_io_end+0x1f/0x50
  [921588.559419]  ext4_io_submit+0x4d/0x60
  [921588.559422]  ext4_writepages+0x2c6/0xcd0
  [921588.559425]  ? update_group_capacity+0x2c/0x1e0
  [921588.559430]  do_writepages+0x43/0xd0
  [921588.559433]  ? do_writepages+0x43/0xd0
  [921588.559436]  __writeback_single_inode+0x44/0x2b0
  [921588.559439]  writeback_sb_inodes+0x22d/0x4c0
  [921588.559443]  __writeback_inodes_wb+0x56/0xf0
  [921588.559446]  wb_writeback+0x1ea/0x2a0
  [921588.559450]  wb_workfn+0x31b/0x490
  [921588.559453]  ? __update_idle_core+0x9b/0xb0
  [921588.559456]  process_one_work+0x220/0x3c0
  [921588.559459]  worker_thread+0x4d/0x3f0
  [921588.559462]  kthread+0x114/0x150
  [921588.559465]  ? process_one_work+0x3c0/0x3c0
  [921588.559467]  ? kthread_park+0x90/0x90
  [921588.559471]  ret_from_fork+0x22/0x30
  [921709.391056] INFO: task jbd2/dm-1-8:319 blocked for more than 120 seconds.
  [921709.391068]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921709.391073] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921709.391077] task:jbd2/dm-1-8     state:D stack:    0 pid:  319 ppid:     
2 flags:0x00004000
  [921709.391083] Call Trace:
  [921709.391087]  __schedule+0x44c/0x8a0
  [921709.391094]  schedule+0x4f/0xc0
  [921709.391098]  md_write_start+0x150/0x240
  [921709.391103]  ? wait_woken+0x80/0x80
  [921709.391108]  raid5_make_request+0x88/0x890 [raid456]
  [921709.391120]  ? wait_woken+0x80/0x80
  [921709.391123]  ? mempool_kmalloc+0x17/0x20
  [921709.391127]  md_handle_request+0x12d/0x1a0
  [921709.391130]  ? __part_start_io_acct+0x51/0xf0
  [921709.391134]  md_submit_bio+0xca/0x100
  [921709.391137]  submit_bio_noacct+0x112/0x4f0
  [921709.391141]  submit_bio+0x51/0x1a0
  [921709.391144]  ? bio_add_page+0x6a/0x90
  [921709.391147]  submit_bh_wbc+0x195/0x1c0
  [921709.391151]  submit_bh+0x13/0x20
  [921709.391154]  jbd2_journal_commit_transaction+0x74b/0x18f0
  [921709.391159]  ? try_to_del_timer_sync+0x54/0x80
  [921709.391164]  kjournald2+0xb6/0x280
  [921709.391168]  ? wait_woken+0x80/0x80
  [921709.391170]  kthread+0x114/0x150
  [921709.391174]  ? commit_timeout+0x20/0x20
  [921709.391177]  ? kthread_park+0x90/0x90
  [921709.391180]  ret_from_fork+0x22/0x30
  [921709.391186] INFO: task systemd-journal:376 blocked for more than 241 
seconds.
  [921709.391191]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921709.391195] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921709.391199] task:systemd-journal state:D stack:    0 pid:  376 ppid:     
1 flags:0x00000220
  [921709.391204] Call Trace:
  [921709.391205]  __schedule+0x44c/0x8a0
  [921709.391210]  schedule+0x4f/0xc0
  [921709.391214]  md_write_start+0x150/0x240
  [921709.391218]  ? wait_woken+0x80/0x80
  [921709.391221]  raid5_make_request+0x88/0x890 [raid456]
  [921709.391230]  ? wait_woken+0x80/0x80
  [921709.391233]  ? mempool_kmalloc+0x17/0x20
  [921709.391236]  md_handle_request+0x12d/0x1a0
  [921709.391239]  ? __part_start_io_acct+0x51/0xf0
  [921709.391242]  md_submit_bio+0xca/0x100
  [921709.391245]  submit_bio_noacct+0x112/0x4f0
  [921709.391248]  ? ext4_fc_reserve_space+0x110/0x230
  [921709.391252]  submit_bio+0x51/0x1a0
  [921709.391255]  ? _cond_resched+0x19/0x30
  [921709.391259]  ? kmem_cache_alloc+0x38e/0x440
  [921709.391262]  ? ext4_init_io_end+0x1f/0x50
  [921709.391266]  ext4_io_submit+0x4d/0x60
  [921709.391270]  ext4_writepages+0x2c6/0xcd0
  [921709.391274]  do_writepages+0x43/0xd0
  [921709.391278]  ? do_writepages+0x43/0xd0
  [921709.391281]  ? fault_dirty_shared_page+0xa5/0x110
  [921709.391285]  __filemap_fdatawrite_range+0xcc/0x110
  [921709.391290]  file_write_and_wait_range+0x74/0xc0
  [921709.391293]  ext4_sync_file+0xf5/0x350
  [921709.391297]  vfs_fsync_range+0x49/0x80
  [921709.391300]  do_fsync+0x3d/0x70
  [921709.391303]  __x64_sys_fsync+0x14/0x20
  [921709.391306]  do_syscall_64+0x38/0x90
  [921709.391310]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921709.391314] RIP: 0033:0x7f4c97ee832b
  [921709.391317] RSP: 002b:00007ffdceb29e50 EFLAGS: 00000293 ORIG_RAX: 
000000000000004a
  [921709.391321] RAX: ffffffffffffffda RBX: 000055ced34b0fa0 RCX: 
00007f4c97ee832b
  [921709.391323] RDX: 00007f4c97fc8000 RSI: 000055ced3487b70 RDI: 
0000000000000021
  [921709.391325] RBP: 0000000000000001 R08: 0000000000000000 R09: 
00007ffdceb29fa8
  [921709.391327] R10: 00007f4c97d2c848 R11: 0000000000000293 R12: 
00007ffdceb29fa8
  [921709.391329] R13: 00007ffdceb29fa0 R14: 000055ced34b0fa0 R15: 
000055ced34bcf90
  [921709.391343] INFO: task mysqld:1505 blocked for more than 241 seconds.
  [921709.391348]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921709.391351] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921709.391355] task:mysqld          state:D stack:    0 pid: 1505 ppid:     
1 flags:0x00000000
  [921709.391359] Call Trace:
  [921709.391361]  __schedule+0x44c/0x8a0
  [921709.391366]  schedule+0x4f/0xc0
  [921709.391370]  md_write_start+0x150/0x240
  [921709.391373]  ? wait_woken+0x80/0x80
  [921709.391376]  raid5_make_request+0x88/0x890 [raid456]
  [921709.391386]  ? wait_woken+0x80/0x80
  [921709.391388]  ? mempool_kmalloc+0x17/0x20
  [921709.391391]  md_handle_request+0x12d/0x1a0
  [921709.391395]  ? __part_start_io_acct+0x51/0xf0
  [921709.391398]  md_submit_bio+0xca/0x100
  [921709.391401]  submit_bio_noacct+0x112/0x4f0
  [921709.391404]  submit_bio+0x51/0x1a0
  [921709.391407]  ? _cond_resched+0x19/0x30
  [921709.391411]  ? kmem_cache_alloc+0x38e/0x440
  [921709.391414]  ? ext4_init_io_end+0x1f/0x50
  [921709.391418]  ext4_io_submit+0x4d/0x60
  [921709.391421]  ext4_writepages+0x2c6/0xcd0
  [921709.391423]  ? __schedule+0x454/0x8a0
  [921709.391427]  ? hrtimer_start_range_ns+0x1aa/0x2f0
  [921709.391430]  ? timerqueue_del+0x24/0x50
  [921709.391435]  ? futex_wait+0x1ed/0x270
  [921709.391439]  do_writepages+0x43/0xd0
  [921709.391443]  ? do_writepages+0x43/0xd0
  [921709.391445]  ? futex_wake+0x7c/0x180
  [921709.391449]  __filemap_fdatawrite_range+0xcc/0x110
  [921709.391453]  file_write_and_wait_range+0x74/0xc0
  [921709.391456]  ext4_sync_file+0xf5/0x350
  [921709.391459]  vfs_fsync_range+0x49/0x80
  [921709.391463]  ? __fget_light+0x62/0x80
  [921709.391466]  do_fsync+0x3d/0x70
  [921709.391469]  __x64_sys_fsync+0x14/0x20
  [921709.391472]  do_syscall_64+0x38/0x90
  [921709.391475]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921709.391478] RIP: 0033:0x7f36188d48db
  [921709.391481] RSP: 002b:00007f35f05487d0 EFLAGS: 00000293 ORIG_RAX: 
000000000000004a
  [921709.391484] RAX: ffffffffffffffda RBX: 00007f360502bf50 RCX: 
00007f36188d48db
  [921709.391486] RDX: 000d239200000000 RSI: 0000000000000000 RDI: 
000000000000000a
  [921709.391488] RBP: 00007f35f0548a00 R08: 0000000000000000 R09: 
00007f360502beb0
  [921709.391490] R10: 00007f35f0548ccf R11: 0000000000000293 R12: 
00007f36042e9610
  [921709.391491] R13: 000000000000000a R14: 0000000000000b00 R15: 
0000000000000000
  [921709.391505] INFO: task mdcheck:40625 blocked for more than 241 seconds.
  [921709.391510]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921709.391514] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921709.391518] task:mdcheck         state:D stack:    0 pid:40625 ppid:     
1 flags:0x00000000
  [921709.391522] Call Trace:
  [921709.391524]  __schedule+0x44c/0x8a0
  [921709.391528]  schedule+0x4f/0xc0
  [921709.391532]  schedule_timeout+0x202/0x290
  [921709.391535]  ? do_truncate+0x78/0xd0
  [921709.391538]  ? try_to_wake_up+0x66/0x5c0
  [921709.391542]  wait_for_completion+0x94/0x100
  [921709.391547]  kthread_stop+0x71/0x170
  [921709.391550]  md_unregister_thread+0x47/0x80
  [921709.391554]  md_reap_sync_thread+0x24/0x200
  [921709.391557]  action_store+0x160/0x2e0
  [921709.391561]  md_attr_store+0x82/0xc0
  [921709.391564]  sysfs_kf_write+0x3e/0x50
  [921709.391567]  kernfs_fop_write_iter+0x138/0x1c0
  [921709.391571]  new_sync_write+0x117/0x1b0
  [921709.391575]  vfs_write+0x1ca/0x280
  [921709.391578]  ksys_write+0x67/0xe0
  [921709.391581]  __x64_sys_write+0x1a/0x20
  [921709.391584]  do_syscall_64+0x38/0x90
  [921709.391588]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [921709.391591] RIP: 0033:0x7f8c6d2791e7
  [921709.391593] RSP: 002b:00007ffea5d97178 EFLAGS: 00000246 ORIG_RAX: 
0000000000000001
  [921709.391597] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 
00007f8c6d2791e7
  [921709.391599] RDX: 0000000000000005 RSI: 000055b618a3eb40 RDI: 
0000000000000001
  [921709.391600] RBP: 000055b618a3eb40 R08: 000000000000000a R09: 
0000000000000004
  [921709.391602] R10: 000055b616e97017 R11: 0000000000000246 R12: 
0000000000000005
  [921709.391604] R13: 00007f8c6d3546a0 R14: 00007f8c6d3554a0 R15: 
00007f8c6d3548a0
  [921709.391607] INFO: task md1_resync:40644 blocked for more than 241 seconds.
  [921709.391611]       Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu
  [921709.391615] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [921709.391619] task:md1_resync      state:D stack:    0 pid:40644 ppid:     
2 flags:0x00004000
  [921709.391623] Call Trace:
  [921709.391625]  __schedule+0x44c/0x8a0
  [921709.391631]  schedule+0x4f/0xc0
  [921709.391635]  md_do_sync.cold+0x8b7/0x953
  [921709.391639]  ? wait_woken+0x80/0x80
  [921709.391642]  ? kernel_sigaction+0x3b/0xd0
  [921709.391646]  md_thread+0xb1/0x170
  [921709.391650]  kthread+0x114/0x150
  [921709.391652]  ? md_start_sync+0x60/0x60
  [921709.391655]  ? kthread_park+0x90/0x90
  [921709.391658]  ret_from_fork+0x22/0x30
  Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] 
[raid10] 
  md1 : active raid5 sda3[0] sdd3[3] sdb3[1] sde3[5] sdc3[6]
        15625582592 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/5] 
[UUUUU]
        [================>....]  check = 84.2% (3289834208/3906395648) 
finish=82779.6min speed=124K/sec
        
  md0 : active raid1 sda2[0] sdb2[1] sdc2[2](S)
        488128 blocks super 1.2 [2/2] [UU]
        
  unused devices: <none>

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.11.0-27-generic 5.11.0-27.29~20.04.1
  ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
  Uname: Linux 5.11.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Tue Sep  7 16:35:01 2021
  InstallationDate: Installed on 2014-03-12 (2736 days ago)
  InstallationMedia: Ubuntu-Server 12.04.4 LTS "Precise Pangolin" - Release 
amd64 (20140204)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-signed-hwe-5.11
  UpgradeStatus: Upgraded to focal on 2020-12-20 (261 days ago)
  --- 
  ProblemType: Bug
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k5.13.0-16-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.11-0ubuntu69
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: [Errno 2] No such file or directory: 'fuser'
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  CasperMD5CheckResult: unknown
  DistroRelease: Ubuntu 21.10
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lspci: Error: [Errno 2] No such file or directory: 'lspci'
  Lspci-vt: Error: [Errno 2] No such file or directory: 'lspci'
  Lsusb: Error: [Errno 2] No such file or directory: 'lsusb'
  Lsusb-t: Error: [Errno 2] No such file or directory: 'lsusb'
  Lsusb-v: Error: [Errno 2] No such file or directory: 'lsusb'
  MachineType: innotek GmbH VirtualBox
  Package: linux-signed-hwe-5.11
  PciMultimedia:
   
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   SHELL=/bin/bash
  ProcFB: 0 svgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-16-generic 
root=/dev/mapper/vg1-root ro quiet splash
  ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13
  RelatedPackageVersions:
   linux-restricted-modules-5.13.0-16-generic N/A
   linux-backports-modules-5.13.0-16-generic  N/A
   linux-firmware                             1.199
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  Tags:  impish
  Uname: Linux 5.13.0-16-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: True
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: 
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:sku:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.family: Virtual Machine
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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