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[Bug 1274479] [NEW] Call Traces found while executing fsracer tests

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Public bug reported:


Host machine : 9.3.189.114(roo/.pasroot)

run "virsh console harini"   to get the console access

Description:
-----------------

fs racer test from ltp test suite was being run on ubuntu alpha 1 guest.
After couple of hours of testing got some errors on the command prompt
along with call trace in dmesg.

Location for fsracer test : /root/ltp-
full-20140115/testcases/kernel/fs/racer/

Ran :

 nohup /root/ltp-full-20140115/testcases/kernel/fs/racer/fs_racer.sh -t
10000000  &

=========================================================================================
On command prompt:
---------------------------------
root@ubuntu:~# [88680.412397] INFO: task ln:16792 blocked for more than 120 seconds.
[88680.412527]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.412992] INFO: task mkdir:16801 blocked for more than 120 seconds.
[88680.413079]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.413145] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.413290] INFO: task dd:17882 blocked for more than 120 seconds.
[88680.413401]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.413468] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.413625] INFO: task fs_racer_file_c:29630 blocked for more than 120 seconds.
[88680.413726]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.413793] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.414025] INFO: task fs_racer_file_c:29631 blocked for more than 120 seconds.
[88680.414127]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.414196] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.414341] INFO: task ln:29635 blocked for more than 120 seconds.
[88680.414425]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.414491] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.414632] INFO: task ln:29637 blocked for more than 120 seconds.
[88680.414715]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.414782] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.415139] INFO: task fs_racer_file_c:29641 blocked for more than 120 seconds.
[88680.415243]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.415311] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.415456] INFO: task mkdir:29646 blocked for more than 120 seconds.
[88680.415539]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.415605] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.415748] INFO: task mkdir:29647 blocked for more than 120 seconds.
[88680.415835]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.415983] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.


==============================================================================

Call trace:
-------------

[88680.412397] INFO: task ln:16792 blocked for more than 120 seconds.
[88680.412527]       Not tainted 3.13.0-5-generic #20-Ubuntu
[88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[88680.412696] ln              D 00003fff9b89ea68     0 16792  25258 0x00040000
[88680.412703] Call Trace:
[88680.412732] [c000000c76ad74b0] [c000000c765eeae0] 0xc000000c765eeae0 (unreliable)
[88680.412852] [c000000c76ad7680] [c0000000000154c0] .__switch_to+0x1d0/0x340
[88680.412917] [c000000c76ad7730] [c000000000abd968] .__schedule+0x368/0x8c0
[88680.412922] [c000000c76ad79b0] [c000000000abe498] .schedule_preempt_disabled+0x18/0x30
[88680.412926] [c000000c76ad7a20] [c000000000ac078c] .__mutex_lock_slowpath+0x18c/0x2c0
[88680.412930] [c000000c76ad7af0] [c000000000ac0924] .mutex_lock+0x64/0x68
[88680.412975] [c000000c76ad7b70] [c0000000002303e0] .kern_path_create+0xb0/0x1e0
[88680.412979] [c000000c76ad7cd0] [c000000000232a48] .user_path_create+0x68/0xa0
[88680.412983] [c000000c76ad7d60] [c000000000233c88] .SyS_symlinkat+0x78/0x140
[88680.412989] [c000000c76ad7e30] [c000000000009e58] syscall_exit+0x0/0x98

===================================================================================

File system status at that moment
--------------------------------------
root@ubuntu:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda         50G   18G   29G  39% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
devtmpfs         25G  8.0K   25G   1% /dev
none            5.0G  216K  5.0G   1% /run
none            5.0M     0  5.0M   0% /run/lock
none             25G     0   25G   0% /run/shm
none            100M     0  100M   0% /run/user
root@ubuntu:~# 


root@ubuntu:~# uname -a
Linux ubuntu 3.13.0-5-generic #20-Ubuntu SMP Mon Jan 20 20:03:57 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
root@ubuntu:~#

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ppc64el

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1274479

Title:
  Call Traces found while executing fsracer tests

Status in “linux” package in Ubuntu:
  New

Bug description:

  Host machine : 9.3.189.114(roo/.pasroot)

  run "virsh console harini"   to get the console access

  Description:
  -----------------

  fs racer test from ltp test suite was being run on ubuntu alpha 1
  guest.  After couple of hours of testing got some errors on the
  command prompt along with call trace in dmesg.

  Location for fsracer test : /root/ltp-
  full-20140115/testcases/kernel/fs/racer/

  Ran :

   nohup /root/ltp-full-20140115/testcases/kernel/fs/racer/fs_racer.sh
  -t 10000000  &

  =========================================================================================
  On command prompt:
  ---------------------------------
  root@ubuntu:~# [88680.412397] INFO: task ln:16792 blocked for more than 120 seconds.
  [88680.412527]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.412992] INFO: task mkdir:16801 blocked for more than 120 seconds.
  [88680.413079]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.413145] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.413290] INFO: task dd:17882 blocked for more than 120 seconds.
  [88680.413401]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.413468] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.413625] INFO: task fs_racer_file_c:29630 blocked for more than 120 seconds.
  [88680.413726]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.413793] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.414025] INFO: task fs_racer_file_c:29631 blocked for more than 120 seconds.
  [88680.414127]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.414196] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.414341] INFO: task ln:29635 blocked for more than 120 seconds.
  [88680.414425]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.414491] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.414632] INFO: task ln:29637 blocked for more than 120 seconds.
  [88680.414715]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.414782] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.415139] INFO: task fs_racer_file_c:29641 blocked for more than 120 seconds.
  [88680.415243]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.415311] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.415456] INFO: task mkdir:29646 blocked for more than 120 seconds.
  [88680.415539]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.415605] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.415748] INFO: task mkdir:29647 blocked for more than 120 seconds.
  [88680.415835]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.415983] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

  
  ==============================================================================

  Call trace:
  -------------

  [88680.412397] INFO: task ln:16792 blocked for more than 120 seconds.
  [88680.412527]       Not tainted 3.13.0-5-generic #20-Ubuntu
  [88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [88680.412696] ln              D 00003fff9b89ea68     0 16792  25258 0x00040000
  [88680.412703] Call Trace:
  [88680.412732] [c000000c76ad74b0] [c000000c765eeae0] 0xc000000c765eeae0 (unreliable)
  [88680.412852] [c000000c76ad7680] [c0000000000154c0] .__switch_to+0x1d0/0x340
  [88680.412917] [c000000c76ad7730] [c000000000abd968] .__schedule+0x368/0x8c0
  [88680.412922] [c000000c76ad79b0] [c000000000abe498] .schedule_preempt_disabled+0x18/0x30
  [88680.412926] [c000000c76ad7a20] [c000000000ac078c] .__mutex_lock_slowpath+0x18c/0x2c0
  [88680.412930] [c000000c76ad7af0] [c000000000ac0924] .mutex_lock+0x64/0x68
  [88680.412975] [c000000c76ad7b70] [c0000000002303e0] .kern_path_create+0xb0/0x1e0
  [88680.412979] [c000000c76ad7cd0] [c000000000232a48] .user_path_create+0x68/0xa0
  [88680.412983] [c000000c76ad7d60] [c000000000233c88] .SyS_symlinkat+0x78/0x140
  [88680.412989] [c000000c76ad7e30] [c000000000009e58] syscall_exit+0x0/0x98

  ===================================================================================

  File system status at that moment
  --------------------------------------
  root@ubuntu:~# df -h
  Filesystem      Size  Used Avail Use% Mounted on
  /dev/sda         50G   18G   29G  39% /
  none            4.0K     0  4.0K   0% /sys/fs/cgroup
  devtmpfs         25G  8.0K   25G   1% /dev
  none            5.0G  216K  5.0G   1% /run
  none            5.0M     0  5.0M   0% /run/lock
  none             25G     0   25G   0% /run/shm
  none            100M     0  100M   0% /run/user
  root@ubuntu:~# 

  
  root@ubuntu:~# uname -a
  Linux ubuntu 3.13.0-5-generic #20-Ubuntu SMP Mon Jan 20 20:03:57 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
  root@ubuntu:~#

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