Messages in this thread | | | Date | Wed, 30 Jun 2010 08:58:22 +0800 | From | Xiao Guangrong <> | Subject | Re: [PATCH v2 8/10] KVM: MMU: prefetch ptes when intercepted guest #PF |
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Marcelo Tosatti wrote:
>>> Also prefetch should be disabled for EPT, due to lack of accessed bit. >>> >> But we call mmu_set_spte() with speculative == false, it not touch the accessed bit. > > There is no accessed bit on EPT. So the aging code (kvm_age_rmapp) > considers any present translation as accessed. There is no way to > distinguish between actually accessed translations and prefetched (but > unused) ones. >
You are right, i'll disable the prefetch for EPT in the next version, thanks for you point it out.
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