** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Chris J Arges (arges)
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https://bugs.launchpad.net/bugs/1443325
Title:
ISST-LTE:Ubuntu15.04: task aio-stress:12277 blocked for more than 120
seconds.
Status in linux package in Ubuntu:
Confirmed
Bug description:
== Comment: #0 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13 01:29:44
==
Defect Description:
===============
I am having one ubuntu 15.04 LE lpar running with regression
run(BASE/IO/TCP). After some hours of run i was not able to get
virtual terminal of lpar but i am able to login via ssh. I did ssh and
i saw these stack traces in dmesg:
[14889.385371] blk_update_request: critical target error, dev dm-10, sector
13842352
[14889.385389] dm-16: WRITE SAME failed. Manually zeroing.
[16080.244960] INFO: task aio-stress:12275 blocked for more than 120 seconds.
[16080.244976] Not tainted 3.19.0-12-generic #12-Ubuntu
[16080.244979] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[16080.244983] aio-stress D 00003fff7e420818 0 12275 12092
0x00040000
[16080.244985] Call Trace:
[16080.244989] [c0000007704633f0] [c000000000015a4c] __switch_to+0x1fc/0x350
[16080.244992] [c000000770463440] [c000000000a3601c] __schedule+0x37c/0x8d0
[16080.244994] [c000000770463670] [c000000000a3a8b4]
schedule_timeout+0x254/0x2f0
[16080.244996] [c000000770463760] [c000000000a377dc]
wait_for_common+0xec/0x240
[16080.244998] [c0000007704637e0] [c0000000002ff1c8]
writeback_inodes_sb_nr+0xb8/0xe0
[16080.245000] [c000000770463880] [c0000000002ffa78]
try_to_writeback_inodes_sb_nr+0x98/0xd0
[16080.245002] [c0000007704638c0] [c0000000003774bc]
ext4_nonda_switch+0xdc/0xf0
[16080.245004] [c000000770463900] [c00000000037e340]
ext4_da_write_begin+0x90/0x3d0
[16080.245006] [c0000007704639c0] [c0000000002134f4]
generic_perform_write+0xf4/0x280
[16080.245008] [c000000770463a60] [c0000000002159e0]
__generic_file_write_iter+0x2a0/0x430
[16080.245009] [c000000770463ac0] [c000000000371428]
ext4_file_write_iter+0x118/0x480
[16080.245011] [c000000770463b80] [c000000000329c78] aio_run_iocb+0x268/0x450
[16080.245013] [c000000770463ce0] [c00000000032afc4] do_io_submit+0x294/0x670
[16080.245015] [c000000770463e30] [c000000000009258] syscall_exit+0x0/0x98
[16080.245017] INFO: task aio-stress:12276 blocked for more than 120 seconds.
[16080.245022] Not tainted 3.19.0-12-generic #12-Ubuntu
[16080.245025] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
I am running IO regression run from last many weeks but i have not seen this
issue in any previous kernel.
root@riverlp1:~# cat /etc/issue
Ubuntu Vivid Vervet (development branch) \n \l
root@riverlp1:~# uname -a
Linux riverlp1 3.19.0-12-generic #12-Ubuntu SMP Fri Apr 3 04:03:54 UTC 2015
ppc64le ppc64le ppc64le GNU/Linux
root@riverlp1:~#
Contact Info: hemantkba...@in.ibm.com
== Comment: #1 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13
01:32:40 ==
== Comment: #2 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13 01:35:52
==
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