KVM: x86/mmu: Batch zap MMU pages when recycling oldest pages

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Collect MMU pages for zapping in a loop when making MMU pages available,
and skip over active roots when doing so as zapping an active root can
never immediately free up a page.  Batching the zapping avoids multiple
remote TLB flushes and remedies the issue where the loop would bail
early if an active root was encountered.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200623193542.7554-3-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-06-23 12:35:40 -07:00 • committed by Paolo Bonzini

parent f95eec9bed

commit 6b82ef2c9c

1 changed files with 39 additions and 13 deletions

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arch/x86/kvm/mmu/mmu.c

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