group.of.nepali.translators team mailing list archive

[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

merged in 4.8-rc5

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Yakkety)
   Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
       Status: New

** Changed in: linux (Ubuntu Yakkety)
       Status: New => Fix Released

** Changed in: linux (Ubuntu Yakkety)
     Assignee: Taco Screen team (taco-screen-team) => (unassigned)

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

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https://bugs.launchpad.net/bugs/1619552

Title:
  Failed to acknowledge elog:
  /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or
  directory)

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  Fix Released

Bug description:
  == Comment: #0 - Mukesh K. Ojha <mukeojha@xxxxxxxxxx> - 2016-09-02 02:10:14 ==
  ---Problem Description---
  Kernel is failed to free the kobject while acknowledging the error log which has been notified two times.
   
  Contact Information = Contact Information =  mukeojha@xxxxxxxxxx 
   
  ---uname output---
  Ubuntu 16.04.01 LTS
   
  Machine Type = All power machine 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   
  Steps to reproduce:
  1.Boot the system to petitboot.
  2. Issue FSP Soft reset of Service Processor From ASMI page.
  3. After FSP comes up, boot the system to host OS.
  4. In the host OS seen the failure to acknowledge for one of elog.

  
  root@p8wookie ~]# service opal_errd status
  Redirecting to /bin/systemctl status  opal_errd.service
  opal_errd.service - opal_errd (PowerNV platform error handling) Service
     Loaded: loaded (/usr/lib/systemd/system/opal_errd.service; enabled)
     Active: active (running) since Wed 2016-08-03 07:55:03 CDT; 2min 4s ago
    Process: 3452 ExecStart=/usr/libexec/ppc64-diag/opal_errd start (code=exited, status=0/SUCCESS)
   Main PID: 3497 (opal_errd)
     CGroup: /system.slice/opal_errd.service
             ??3497 /usr/sbin/opal_errd

  Aug 03 07:57:03 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required
  Aug 03 07:57:03 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory)
  Aug 03 07:57:04 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required
  Aug 03 07:57:04 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory)
  Aug 03 07:57:05 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required
  Aug 03 07:57:05 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory)
  Aug 03 07:57:06 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required
  Aug 03 07:57:06 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory)
  Aug 03 07:57:07 p8wookie.aus.stglabs.ibm.com ELOG[3497]: LID[5018d709]::SRC[B1763435]::Other Subsystems::Informational Event::No service action required
  Aug 03 07:57:07 p8wookie.aus.stglabs.ibm.com ELOG[3497]: Failed to acknowledge elog: /sys/firmware/opal/elog/0x5018d709/acknowledge (2:No such file or directory)


  
  [root@p8wookie ~]# cd /sys/firmware/opal/elog/
  [root@p8wookie elog]# ls
  0x5018d709
  [root@p8wookie elog]# 
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Info:
    The system is not configured to capture a system dump.
   
  *Additional Instructions for Contact Information =  mukeojha@xxxxxxxxxx: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Mukesh K. Ojha <mukeojha@xxxxxxxxxx> - 2016-09-02 02:12:45 ==
  Upstream commit :

  commit a9cbf0b2195b695cbeeeecaa4e2770948c212e9a
  Author: Mukesh Ojha <mukesh02@xxxxxxxxxxxxxxxxxx>
  Date:   Mon Aug 22 12:17:44 2016 +0530

      powerpc/powernv : Drop reference added by kset_find_obj()
      
      In a situation, where Linux kernel gets notified about duplicate error log
      from OPAL, it is been observed that kernel fails to remove sysfs entries
      (/sys/firmware/opal/elog/0xXXXXXXXX) of such error logs. This is because,
      we currently search the error log/dump kobject in the kset list via
      'kset_find_obj()' routine. Which eventually increment the reference count
      by one, once it founds the kobject.

  
  Above patch is the solution of this bugzilla.

  Kindly pull this patch in for both Ubuntu 16.04 LTS and Ubuntu 16.10.

  -Mukesh

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