Messages in this thread | | | Date | Sat, 16 Mar 2013 11:13:30 +0900 | From | Takuya Yoshikawa <> | Subject | Re: [PATCH 5/5] KVM: MMU: fast invalid all mmio sptes |
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On Fri, 15 Mar 2013 23:29:53 +0800 Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:
> +/* > + * The caller should protect concurrent access on > + * kvm->arch.mmio_invalid_gen. Currently, it is used by > + * kvm_arch_commit_memory_region and protected by kvm->slots_lock. > + */ > +void kvm_mmu_invalid_mmio_spte(struct kvm *kvm)
kvm_mmu_invalidate_mmio_sptes() may be a better name.
Thanks, Takuya
> +{ > + /* Ensure update memslot has been completed. */ > + smp_mb(); > + > + trace_kvm_mmu_invalid_mmio_spte(kvm); > + > + /* > + * The very rare case: if the generation-number is round, > + * zap all shadow pages. > + */ > + if (unlikely(kvm->arch.mmio_invalid_gen++ == MAX_GEN)) { > + kvm->arch.mmio_invalid_gen = 0; > + return kvm_mmu_zap_all(kvm); > + } > +} > +
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