KVM: x86/mmu: Revert "KVM: x86/mmu: Remove is_obsolete() call"

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Now that the fast invalidate mechanism has been reintroduced, restore
the performance tweaks for fast invalidation that existed prior to its
removal.

Paraphrasing the original changelog (commit 5ff0568374 was itself a
partial revert):

  Don't force reloading the remote mmu when zapping an obsolete page, as
  a MMU_RELOAD request has already been issued by kvm_mmu_zap_all_fast()
  immediately after incrementing mmu_valid_gen, i.e. after marking pages
  obsolete.

This reverts commit 5ff0568374.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Sean Christopherson 2019-09-12 19:46:10 -07:00 • committed by Paolo Bonzini

parent 31741eb11a

commit 10605204e9

2 changed files with 24 additions and 6 deletions

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arch/x86/kvm/mmu.c

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1

arch/x86/kvm/x86.c

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