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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
