[Bug 1765460] Re: [opal-prd] opal-prd is consuming 100% CPU

[Andrew Cloke]

** Changed in: ubuntu-power-systems
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1765460

Title:
  [opal-prd]  opal-prd is consuming 100% CPU

Status in The Ubuntu-power-systems project:
  Fix Released
Status in skiboot package in Ubuntu:
  Fix Released

Bug description:
  ---Problem Description---
  opal-prd fix for Ubuntu 18.04

   In some corner cases where opal-prd fails to access/read flash device (/dev/mtd0) we see opal-prd consuming 100% cpu. This mostly happens during boot time where opal-prd daemon tries to start even before mtd driver loaded.   Its not easy to reproduce. It happens randomly.
   
  ---uname output---
  Ubuntu 18.04
   
  Machine Type = OpenPower System 
   
  Userspace tool common name: opal-prd 
   
  Below upstream patch will fix this issue.

  commit cb16e55a234b91fd42112904cff15094fbae680d
  Author: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
  Date:   Tue Apr 3 23:08:41 2018 +0530

      opal-prd: Insert powernv_flash module
      
      Explictly load powernv_flash module on BMC based system so that we are sure
      that flash device is created before starting opal-prd daemon.
      
  -Vasant

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