[PATCH v4 0/2] KVM: x86/mmu: Skip mmu_notifier changes when possible

[David Stevens]

These patches reduce how often mmu_notifier updates block guest page
faults. The primary benefit of this is the reduction in the likelihood
of extreme latency when handling a page fault due to another thread
having been preempted while modifying host virtual addresses.

v3 -> v4:
 - Fix bug by skipping prefetch during invalidation

v2 -> v3:
 - Added patch to skip check for MMIO page faults
 - Style changes

David Stevens (1):
  KVM: x86/mmu: Consider the hva in mmu_notifier retry

Sean Christopherson (1):
  KVM: x86/mmu: Skip mmu_notifier check when handling MMIO page fault

 arch/powerpc/kvm/book3s_64_mmu_hv.c    |  2 +-
 arch/powerpc/kvm/book3s_64_mmu_radix.c |  2 +-
 arch/x86/kvm/mmu/mmu.c                 | 23 ++++++++++++++------
 arch/x86/kvm/mmu/paging_tmpl.h         |  7 ++++---
 include/linux/kvm_host.h               | 25 +++++++++++++++++++++-
 virt/kvm/kvm_main.c                    | 29 ++++++++++++++++++++++----
 6 files changed, 72 insertions(+), 16 deletions(-)

-- 
2.30.0.617.g56c4b15f3c-goog