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------- Comment From cdeadmin@xxxxxxxxxx 2015-11-05 21:41 EDT-------
==== State: Assigned by: tuandoan on 05 November 2015 15:16:40 ====

#=#=# 2015-11-05 15:16:38 (CST) #=#=#
New Fix_Potential = [P810.20W]
#=#=#=#=#=#=#=#=#=#=#=#=#=#=#=#=#=#=#

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https://bugs.launchpad.net/bugs/1505178

Title:
  MFG: Habanero: hxestorage exerciser logs task blocked messages in
  dmesg when running disks under PMC Sierra

Status in linux package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0  ==

  When running STX on Habanero systems with PMC Sierra, the following
  linux error messages are found when running "dmesg -T
  --level=alert,crit,err" after the run.

  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18049 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18177 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18181 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18185 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18189 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18194 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18200 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18205 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18213 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18221 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

  We are running the following code levels.

         ver 1.5.4.3 - OS, HTX, Firmware and Machine details

                             OS: GNU/Linux
                     OS Version: Ubuntu 14.04.3 LTS \n \l
                 Kernel Version: 3.19.0-25-generic
                    HTX Version: htxubuntu-357
                      Host Name: rcx2c357
              Machine Serial No: 1035C5A         
             Machine Type/Model: 8348-21C        

  
  We have a very limited number of PMC Sierra configs.  I've seen this error on both EC3S and ECSY PMC adapter types.  We've only run systems with 6TB drives or a mix of 6TB and 8TB disk drives so far.

  
  == Comment: #5  ==
  Call Trace:

  dmesg -T

  ---------------
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18049 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] hxestorage      D 00003fff78c69a20     0 18049    451 0x00040000
  [Fri Oct  2 12:36:52 2015] Call Trace:
  [Fri Oct  2 12:36:52 2015] [c00000791de17490] [c0000079111f8980] 0xc0000079111f8980 (unreliable)
  [Fri Oct  2 12:36:52 2015] [c00000791de17660] [c000000000015934] __switch_to+0x204/0x350
  [Fri Oct  2 12:36:52 2015] [c00000791de176c0] [c000000000a11948] __schedule+0x368/0x8d0
  [Fri Oct  2 12:36:52 2015] [c00000791de178e0] [c000000000a124e0] schedule_preempt_disabled+0x20/0x30
  [Fri Oct  2 12:36:52 2015] [c00000791de17900] [c000000000a1464c] __mutex_lock_slowpath+0xfc/0x1f0
  [Fri Oct  2 12:36:52 2015] [c00000791de17980] [c000000000a147ac] mutex_lock+0x6c/0x70
  [Fri Oct  2 12:36:52 2015] [c00000791de179b0] [c0000000003050a8] __blkdev_get+0xa8/0x4d0
  [Fri Oct  2 12:36:52 2015] [c00000791de17a20] [c000000000305730] blkdev_get+0x260/0x4d0
  [Fri Oct  2 12:36:52 2015] [c00000791de17ad0] [c0000000002b10c0] do_dentry_open+0x270/0x410
  [Fri Oct  2 12:36:52 2015] [c00000791de17b30] [c0000000002c6368] do_last+0x1b8/0xf30
  [Fri Oct  2 12:36:52 2015] [c00000791de17c00] [c0000000002c96fc] path_openat+0xdc/0x7c0
  [Fri Oct  2 12:36:52 2015] [c00000791de17cd0] [c0000000002cb358] do_filp_open+0x58/0xd0
  [Fri Oct  2 12:36:52 2015] [c00000791de17db0] [c0000000002b2e88] do_sys_open+0x1c8/0x390
  [Fri Oct  2 12:36:52 2015] [c00000791de17e30] [c000000000009258] system_call+0x38/0xd0
  [Fri Oct  2 12:36:52 2015] INFO: task hxestorage:18177 blocked for more than 120 seconds.
  [Fri Oct  2 12:36:52 2015]       Tainted: G           OE  3.19.0-25-generic #26~14.04.1-Ubuntu
  [Fri Oct  2 12:36:52 2015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [Fri Oct  2 12:36:52 2015] hxestorage      D 00003fff78c69a20     0 18177    451 0x00040000
  [Fri Oct  2 12:36:52 2015] Call Trace:
  [Fri Oct  2 12:36:52 2015] [c00000791beb7490] [00000000000025f7] 0x25f7 (unreliable)
  [Fri Oct  2 12:36:52 2015] [c00000791beb7660] [c000000000015934] __switch_to+0x204/0x350
  [Fri Oct  2 12:36:52 2015] [c00000791beb76c0] [c000000000a11948] __schedule+0x368/0x8d0
  [Fri Oct  2 12:36:52 2015] [c00000791beb78e0] [c000000000a124e0] schedule_preempt_disabled+0x20/0x30
  [Fri Oct  2 12:36:52 2015] [c00000791beb7900] [c000000000a1464c] __mutex_lock_slowpath+0xfc/0x1f0
  [Fri Oct  2 12:36:52 2015] [c00000791beb7980] [c000000000a147ac] mutex_lock+0x6c/0x70
  [Fri Oct  2 12:36:52 2015] [c00000791beb79b0] [c0000000003050a8] __blkdev_get+0xa8/0x4d0
  [Fri Oct  2 12:36:52 2015] [c00000791beb7a20] [c000000000305730] blkdev_get+0x260/0x4d0
  [Fri Oct  2 12:36:52 2015] [c00000791beb7ad0] [c0000000002b10c0] do_dentry_open+0x270/0x410
  [Fri Oct  2 12:36:52 2015] [c00000791beb7b30] [c0000000002c6368] do_last+0x1b8/0xf30
  [Fri Oct  2 12:36:52 2015] [c00000791beb7c00] [c0000000002c96fc] path_openat+0xdc/0x7c0
  [Fri Oct  2 12:36:52 2015] [c00000791beb7cd0] [c0000000002cb358] do_filp_open+0x58/0xd0
  [Fri Oct  2 12:36:52 2015] [c00000791beb7db0] [c0000000002b2e88] do_sys_open+0x1c8/0x390
  [Fri Oct  2 12:36:52 2015] [c00000791beb7e30] [c000000000009258] system_call+0x38/0xd0

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