[Bug 1904585] Comment bridged from LTC Bugzilla

[bugproxy]

------- Comment From hegdevasant at in.ibm.com 2020-12-10 02:01 EDT-------
(In reply to comment #7)
> Hello,
> I've uploaded a new version of skiboot for hirsute to this ppa
> ppa:mclemenceau/distro-work
> Can you confirm this resolve the issue on this LP and I'll start release
> process for hirsute and other impacted series
> Thanks
> Matthieu

Looks good.

-Vasant

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https://bugs.launchpad.net/bugs/1904585

Title:
  opal-prd: Have a worker process handle page offlining (Fixes
  "PlatServices: dyndealloc memory_error() failed" is getting reported
  in error log (opal-prd))

Status in The Ubuntu-power-systems project:
  Triaged
Status in skiboot package in Ubuntu:
  New
Status in skiboot source package in Xenial:
  New
Status in skiboot source package in Bionic:
  New
Status in skiboot source package in Focal:
  New
Status in skiboot source package in Groovy:
  New
Status in skiboot source package in Hirsute:
  New

Bug description:
  --Problem Description---

  https://github.com/open-
  power/skiboot/commit/8cbd0de88d162e387f11569eee1bdecef8fad2e3

  opal-prd: Have a worker process handle page offlining

  The memory_error() hservice interface expects the memory_error() call to
  just accept the offline request and return without actually offlining the
  memory. Currently we will attempt to offline the marked pages before
  returning to HBRT which can result in an excessively long time spent in the
  memory_error() hservice call which blocks HBRT from processing other
  errors. Fix this by adding a worker process which performs the page
  offlining via the sysfs memory error interfaces.

  Reviewed-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
  Signed-off-by: Oliver O'Halloran <oohall at gmail.com>

  Thanks in advance for your support.
   
  Machine Type = Power8 and Power9 OPAL systems 
   
  ---Steps to Reproduce---
  * Inject memory error (UE) 
  * Verify that opal-prd doesn't return asynchronously to the platform after requesting the memory offlining operation
   
  Userspace tool common name: opal-prd 
   
  We need this fix for 16.04.x and 18.04.x LTS releases.

  Fix also is needed for 20.04 and 20.10.

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