blocked for more than 120 seconds issues with iowait and timeout on Live Linux distribution while writing to physical disk -

blocked for more than 120 seconds issues with iowait and timeout on Live Linux distribution while writing to physical disk

This happened while an mdadm array was syncing, all access from writing a new blank file to opening a small .txt file was very slow:

 

[222117.312078] kjournald starting.  Commit interval 5 seconds
[222117.685060] EXT3-fs (md0): using internal journal
[222117.685096] EXT3-fs (md0): mounted filesystem with ordered data mode
[222122.376847] kjournald starting.  Commit interval 5 seconds
[222122.602825] EXT3-fs (md2): using internal journal
[222122.602866] EXT3-fs (md2): mounted filesystem with ordered data mode
[223081.568032] INFO: task kjournald:352 blocked for more than 120 seconds.
[223081.568069] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[223081.568121] kjournald       D ef1e41c0     0   352      2 0x00000000
[223081.568157]  eee0dac0 00000046 ef1e41c0 ef1e41c0 0000cab8 00000000 e971ee70 22650000
[223081.568219]  e8c11c9f ccb941c0 eee0dc74 ccb941c0 eee0dac0 ccb941c0 ccb941c0 00000000
[223081.568280]  eee0daf4 eee0daf4 ef1e4204 ff48eeaf c102e1e0 e971ee70 00000012 ff48eeaf
[223081.568341] Call Trace:
[223081.568375]  [<c102e1e0>] ? dequeue_task_fair+0x149/0x1d6
[223081.568411]  [<c11939a6>] ? journal_commit_transaction+0x12c/0xd02
[223081.568446]  [<c1605d15>] ? __schedule+0x5cb/0x5f2
[223081.568478]  [<c1047ef5>] ? wake_up_bit+0x56/0x56
[223081.568510]  [<c103bfe1>] ? lock_timer_base+0x19/0x34
[223081.568541]  [<c103c48c>] ? try_to_del_timer_sync+0x5c/0x63
[223081.568574]  [<c1197306>] ? kjournald+0xb5/0x1cc
[223081.568604]  [<c1047ef5>] ? wake_up_bit+0x56/0x56
[223081.568633]  [<c1197251>] ? commit_timeout+0x5/0x5
[223081.568663]  [<c1047b9f>] ? kthread+0x63/0x68
[223081.568692]  [<c1047b3c>] ? kthread_worker_fn+0x114/0x114
[223081.568725]  [<c160cbbe>] ? kernel_thread_helper+0x6/0xd
[223081.568756] INFO: task vi:530 blocked for more than 120 seconds.
[223081.568787] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[223081.568838] vi              D 00000002     0   530  32563 0x00000004
[223081.568873]  cc72dee0 00000086 00000003 00000002 c1098a00 00000000 00204033 22636000
[223081.572601]  00000002 ccb941c0 cc72e094 ccb941c0 cc72dee0 ccb941c0 ccb941c0 eec86180
[223081.572662]  c10284ce 00000002 00000001 00000005 cc263dec 00000000 00000001 eec03870
[223081.572723] Call Trace:
[223081.572751]  [<c1098a00>] ? __alloc_pages_nodemask+0x121/0x572
[223081.572785]  [<c10284ce>] ? find_busiest_group+0x244/0x7e5
[223081.572818]  [<c104e4e8>] ? timekeeping_get_ns+0x10/0x48
[223081.572850]  [<c104f849>] ? ktime_get_ts+0x76/0x7d
[223081.572880]  [<c1605fff>] ? io_schedule+0x6c/0xa4
[223081.572911]  [<c10e40f0>] ? sleep_on_buffer+0x5/0x8
[223081.572941]  [<c1606255>] ? __wait_on_bit_lock+0x2f/0x68
[223081.572973]  [<c10e40eb>] ? unmap_underlying_metadata+0x41/0x41
[223081.573005]  [<c10e40eb>] ? unmap_underlying_metadata+0x41/0x41
[223081.573037]  [<c1606329>] ? out_of_line_wait_on_bit_lock+0x9b/0xa3
[223081.573071]  [<c1047f1e>] ? autoremove_wake_function+0x29/0x29
[223081.573103]  [<c10e4210>] ? __lock_buffer+0x1c/0x1e
[223081.573133]  [<c1192e25>] ? do_get_write_access+0x4f/0x305
[223081.573166]  [<c11928e1>] ? start_this_handle+0x27a/0x2d6
[223081.573197]  [<c1196d5a>] ? journal_add_journal_head+0x85/0xec
[223081.573230]  [<c11930f3>] ? journal_get_write_access+0x18/0x26
[223081.573263]  [<c1154fde>] ? __ext3_journal_get_write_access+0x16/0x36
[223081.573298]  [<c114ae9a>] ? ext3_orphan_add+0x78/0x13e
[223081.573328]  [<c1192a4e>] ? journal_start+0x80/0xa7
[223081.573359]  [<c1147da7>] ? ext3_setattr+0x180/0x2ad
[223081.573391]  [<c10d627e>] ? notify_change+0x182/0x252
[223081.573424]  [<c10c40d6>] ? do_truncate+0x61/0x77
[223081.573455]  [<c10ce12b>] ? do_last+0x4c4/0x52f
[223081.573485]  [<c10ce620>] ? path_openat+0x9f/0x285
[223081.573514]  [<c10ce8aa>] ? do_filp_open+0x21/0x5d
[223081.573545]  [<c10c10a8>] ? kmem_cache_alloc+0x21/0xd9
[223081.573576]  [<c10cc7ed>] ? getname_flags+0x24/0xd5
[223081.573606]  [<c10c3779>] ? do_sys_open+0x58/0xd1
[223081.573636]  [<c10c3836>] ? sys_open+0x1e/0x23
[223081.573666]  [<c160711c>] ? syscall_call+0x7/0x7


[224161.572060] INFO: task kjournald:349 blocked for more than 120 seconds.
[224161.572099] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[224161.572151] kjournald       D ef1e41c0     0   349      2 0x00000000
[224161.572187]  eee0f7a0 00000046 ef1e41c0 ef1e41c0 0000cbae 00000000 e07bdd83 22650000
[224161.572248]  dfcdf1fd ccb941c0 eee0f954 ccb941c0 eee0f7a0 ccb941c0 ccb941c0 00000000
[224161.572310]  eee0f7d4 eee0f7d4 ef1e4204 ff52147a c102e1e0 e07bdd83 0000001d ff52147a
[224161.572371] Call Trace:
[224161.572405]  [<c102e1e0>] ? dequeue_task_fair+0x149/0x1d6
[224161.572441]  [<c11939a6>] ? journal_commit_transaction+0x12c/0xd02
[224161.572477]  [<c1605d15>] ? __schedule+0x5cb/0x5f2
[224161.572509]  [<c1047ef5>] ? wake_up_bit+0x56/0x56
[224161.572541]  [<c103bfe1>] ? lock_timer_base+0x19/0x34
[224161.572573]  [<c103c48c>] ? try_to_del_timer_sync+0x5c/0x63
[224161.572605]  [<c1197306>] ? kjournald+0xb5/0x1cc
[224161.572635]  [<c1047ef5>] ? wake_up_bit+0x56/0x56
[224161.572664]  [<c1197251>] ? commit_timeout+0x5/0x5
[224161.572694]  [<c1047b9f>] ? kthread+0x63/0x68
[224161.572723]  [<c1047b3c>] ? kthread_worker_fn+0x114/0x114
[224161.572757]  [<c160cbbe>] ? kernel_thread_helper+0x6/0xd
[224161.572789] INFO: task vi:791 blocked for more than 120 seconds.
[224161.572821] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[224161.572872] vi              D 00000010     0   791    552 0x00000000
[224161.572907]  cc47f380 00000086 00000040 00000010 c1820380 00000000 00000000 22629000
[224161.572968]  00000002 ccb941c0 cc47f534 ccb941c0 cc47f380 ccb941c0 ccb941c0 ef1b8c40
[224161.573029]  eec03870 eec44a40 c14747c5 eec03860 eec86100 c10284ce 00000002 00000001
[224161.573090] Call Trace:
[224161.573117]  [<c14747c5>] ? cpumask_next_and+0x20/0x2b
[224161.573150]  [<c10284ce>] ? find_busiest_group+0x244/0x7e5
[224161.573183]  [<c104e4e8>] ? timekeeping_get_ns+0x10/0x48
[224161.573214]  [<c104f849>] ? ktime_get_ts+0x76/0x7d
[224161.573244]  [<c1605fff>] ? io_schedule+0x6c/0xa4
[224161.573275]  [<c10e40f0>] ? sleep_on_buffer+0x5/0x8
[224161.573305]  [<c1606255>] ? __wait_on_bit_lock+0x2f/0x68
[224161.573337]  [<c10e40eb>] ? unmap_underlying_metadata+0x41/0x41
[224161.573370]  [<c10e40eb>] ? unmap_underlying_metadata+0x41/0x41
[224161.573402]  [<c1606329>] ? out_of_line_wait_on_bit_lock+0x9b/0xa3
[224161.573435]  [<c1047f1e>] ? autoremove_wake_function+0x29/0x29
[224161.573468]  [<c10e4210>] ? __lock_buffer+0x1c/0x1e
[224161.573498]  [<c1192e25>] ? do_get_write_access+0x4f/0x305
[224161.573530]  [<c1196d5a>] ? journal_add_journal_head+0x85/0xec
[224161.573562]  [<c11930f3>] ? journal_get_write_access+0x18/0x26
[224161.573596]  [<c1154fde>] ? __ext3_journal_get_write_access+0x16/0x36
[224161.573630]  [<c1145c46>] ? ext3_reserve_inode_write+0x2d/0x5a
[224161.573663]  [<c114aeb2>] ? ext3_orphan_add+0x90/0x13e
[224161.573693]  [<c1147da7>] ? ext3_setattr+0x180/0x2ad
[224161.573726]  [<c10d627e>] ? notify_change+0x182/0x252
[224161.573758]  [<c10c40d6>] ? do_truncate+0x61/0x77
[224161.573790]  [<c10ce12b>] ? do_last+0x4c4/0x52f
[224161.573819]  [<c10ce7b1>] ? path_openat+0x230/0x285
[224161.573849]  [<c10ce8aa>] ? do_filp_open+0x21/0x5d
[224161.573880]  [<c10cc7ed>] ? getname_flags+0x24/0xd5
[224161.573910]  [<c10c3779>] ? do_sys_open+0x58/0xd1
[224161.573940]  [<c10c3836>] ? sys_open+0x1e/0x23
[224161.573970]  [<c160711c>] ? syscall_call+0x7/0x7
[224161.573999] INFO: task grub:817 blocked for more than 120 seconds.
[224161.574031] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[224161.574082] grub            D 00000002     0   817  32563 0x00000004
[224161.574117]  cc47eb40 00000082 c109a37f 00000002 0000000e 00000000 c9eabec4 22643000
[224161.574178]  00000000 ccb941c0 cc47ecf4 ccb941c0 cc47eb40 ccb941c0 ccb941c0 c9eabf1c
[224161.574239]  c1093d65 0000000e 00000001 c9eabf38 00000000 c9eabf34 00000000 c8270270
[224161.574300] Call Trace:
[224161.574325]  [<c109a37f>] ? write_cache_pages+0x10d/0x2be
[224161.574358]  [<c1093d65>] ? find_get_pages_tag+0x37/0xd1
[224161.574390]  [<c1025f08>] ? __wake_up+0x2c/0x3b
[224161.574419]  [<c1048067>] ? prepare_to_wait+0x14/0x52
[224161.574450]  [<c11971b3>] ? log_wait_commit+0xa9/0xf1
[224161.574480]  [<c1047ef5>] ? wake_up_bit+0x56/0x56
[224161.574510]  [<c1153556>] ? ext3_sync_fs+0x5d/0x67
[224161.574541]  [<c10f9d6f>] ? dquot_quota_sync+0x193/0x235
[224161.574572]  [<c10f9bdc>] ? dquot_file_open+0x25/0x25
[224161.574603]  [<c10e1fc4>] ? __sync_filesystem+0x69/0x69
[224161.574634]  [<c10e1f8b>] ? __sync_filesystem+0x30/0x69
[224161.574664]  [<c10c6a1f>] ? iterate_supers+0x4e/0x8d
[224161.574695]  [<c10e2005>] ? sys_sync+0x36/0x49
[224161.574724]  [<c160711c>] ? syscall_call+0x7/0x7

 


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