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KVM: X86: Optimize zapping rmap
authorPeter Xu <peterx@redhat.com>
Fri, 30 Jul 2021 22:06:05 +0000 (18:06 -0400)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 4 Aug 2021 09:55:56 +0000 (05:55 -0400)
commita75b540451d20ef1aebaa09d183ddc5c44c6f86a
tree360879500a6da4239f9f03dcfb6ef70a5834b1b3tree
parent13236e25ebab91b3e42ddedf5354b569ace1b555commit | diff
KVM: X86: Optimize zapping rmap

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>
arch/x86/kvm/mmu/mmu.c diff | blob | blame | history
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