[PATCH v6 0/9] KVM: MMU: fast page fault

[Xiao Guangrong]

Changlog:
- disable fast page fault for soft mmu, let it only works for direct sptes.
- optimize spte_has_volatile_bits() and mmu_spte_update()

Performance result:
(The benchmark can be found at: http://www.spinics.net/lists/kvm/msg73011.html)

                               before            after
Run 10 times, Avg time:      532473698 ns.      195864447 ns. +63.2%

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