Messages in this thread | | | Date | Wed, 11 May 2011 14:28:03 +0300 | From | Avi Kivity <> | Subject | Re: [PATCH v2] KVM: MMU: optimize pte write path if don't have protected sp |
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On 05/11/2011 05:44 AM, Xiao Guangrong wrote: > Simply return from kvm_mmu_pte_write path if no shadow page is > write-protected, then we can avoid to walk all shadow pages and hold > mmu-lock > > @@ -1038,8 +1038,10 @@ static void kvm_mmu_free_page(struct kvm *kvm, struct kvm_mmu_page *sp) > hlist_del(&sp->hash_link); > list_del(&sp->link); > free_page((unsigned long)sp->spt); > - if (!sp->role.direct) > + if (!sp->role.direct) { > free_page((unsigned long)sp->gfns); > + atomic_dec(&kvm->arch.indirect_shadow_pages); > + } > kmem_cache_free(mmu_page_header_cache, sp); > kvm_mod_used_mmu_pages(kvm, -1); > } > @@ -1536,6 +1538,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, > kvm_sync_pages(vcpu, gfn); > > account_shadowed(vcpu->kvm, gfn); > + atomic_inc(&vcpu->kvm->arch.indirect_shadow_pages); > }
Better in account_shadowed()/unaccount_shadowed(), no?
-- error compiling committee.c: too many arguments to function
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