KVM: X86: Optimize zapping rmap

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Using rmap_get_first() and rmap_remove() for zapping a huge rmap list could be
slow.  The easy way is to travers the rmap list, collecting the a/d bits and
free the slots along the way.

Provide a pte_list_destroy() and do exactly that.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210730220605.26377-1-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Peter Xu 2021-07-30 18:06:05 -04:00 • committed by Paolo Bonzini

parent 13236e25eb

commit a75b540451

1 changed files with 29 additions and 12 deletions

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arch/x86/kvm/mmu/mmu.c

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