[PATCH v4 0/2] powerpc/pseries: Improve serialization of PRRN events

[Nathan Fontenot]

Stress testing has uncovered issues with handling continuously queued PRRN
events. Running PRRN events in this way can seriously load the system given
the sheer volume of dlpar being handled. This patchset ensures that PRRN
events are handled more synchronously. It also updates dlpar invocation
so that it can be done directly instead of waiting on a workqueue.

-Nathan
---
v4:
  -Update patch 1/2 to remove prrn workqueue
  -Replace patch 2/2 to allow for direct dlpar invocation
v3:
  -Scrap the PRRN mutex as it only replicates existing workqueue behavior.
v2:
  -Unlock prrn_lock when PRRN operations are complete, not after handler is
   scheduled.
  -Remove call to flush_work, the previous broken method of serializing
   PRRN events.

Nathan Fontenot (2):
      powerpc/pseries: Remove prrn_work workqueue
      powerpc/pseries:Remove unneeded uses of dlpar work queue


 arch/powerpc/kernel/rtasd.c               |   17 ++-----------
 arch/powerpc/platforms/pseries/dlpar.c    |   37 +++++++----------------------
 arch/powerpc/platforms/pseries/mobility.c |   18 +++++---------
 arch/powerpc/platforms/pseries/pseries.h  |    5 ++--
 arch/powerpc/platforms/pseries/ras.c      |    2 +-
 5 files changed, 22 insertions(+), 57 deletions(-)