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[PATCH v2 0/4] Drivers: hv: balloon: fix WS2012 memory hotplug issues and do some cleanup

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Changes since v1:
- Keep ol_waitevent and wait when kernel memory onlining is disabled [Alex Ng]

Crashes with Hyper-V balloon driver are reported with WS2012 (non-R2),
hosts I was able to identify two issues which I fix with first two patches
of this series. Patches 3 removes wait on ol_waitevent when we have in
in-kernel memory onlining, patch 4 gets rid of ha_region_mutex by doing
the locking fine-grained with a spinlock.

Vitaly Kuznetsov (4):
  Drivers: hv: balloon: keep track of where ha_region starts
  Drivers: hv: balloon: account for gaps in hot add regions
  Drivers: hv: balloon: don't wait for ol_waitevent when
    memhp_auto_online is enabled
  Drivers: hv: balloon: replace ha_region_mutex with spinlock

 drivers/hv/hv_balloon.c | 216 ++++++++++++++++++++++++++++++++----------------
 1 file changed, 144 insertions(+), 72 deletions(-)

-- 
2.7.4

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[PATCH v2 0/4] Drivers: hv: balloon: fix WS2012 memory hotplug issues and do some cleanup Vitaly Kuznetsov <vkuznets@redhat.com> - 2016-08-11 14:50 +0200
  [PATCH v2 1/4] Drivers: hv: balloon: keep track of where ha_region starts Vitaly Kuznetsov <vkuznets@redhat.com> - 2016-08-11 14:50 +0200
  [PATCH v2 3/4] Drivers: hv: balloon: don't wait for ol_waitevent when memhp_auto_online is enabled Vitaly Kuznetsov <vkuznets@redhat.com> - 2016-08-11 14:50 +0200
  [PATCH v2 4/4] Drivers: hv: balloon: replace ha_region_mutex with spinlock Vitaly Kuznetsov <vkuznets@redhat.com> - 2016-08-11 14:50 +0200
  [PATCH v2 2/4] Drivers: hv: balloon: account for gaps in hot add regions Vitaly Kuznetsov <vkuznets@redhat.com> - 2016-08-11 14:50 +0200

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