Il 03/07/2013 10:50, Xiao Guangrong ha scritto:
>> > Please wait a while. I can not understand it very clearly.
>> > 
>> > This conditional check will cause caching a overflow value into mmio spte.
>> > The simple case is that kvm adds new slots for many times, the mmio-gen is 
>> > easily
>> > more than MMIO_MAX_GEN.
>> > 
> Actually, the double zapping can be avoided by moving 
> kvm_mmu_invalidate_mmio_sptes to
> the end of install_new_memslots().
> 
> 

Yes, the actual operation would be the same as this patch.  You can
rename kvm_mmu_invalidate_mmio_sptes to kvm_arch_memslots_installed, or
something like that.  But it would have to touch all architectures.

Paolo
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