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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1274479

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: trusty

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https://bugs.launchpad.net/bugs/1274479

Title:
  Call Traces found while executing fsracer tests

Status in “linux” package in Ubuntu:
  Incomplete

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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