forked from Minki/linux
KVM: MMU: don't get free page number in the loop
In the later patch, we will modify sp's zapping way like below: kvm_mmu_prepare_zap_page A kvm_mmu_prepare_zap_page B kvm_mmu_prepare_zap_page C .... kvm_mmu_commit_zap_page [ zaped multiple sps only need to call kvm_mmu_commit_zap_page once ] In __kvm_mmu_free_some_pages() function, the free page number is getted form 'vcpu->kvm->arch.n_free_mmu_pages' in loop, it will hinders us to apply kvm_mmu_prepare_zap_page() and kvm_mmu_commit_zap_page() since kvm_mmu_prepare_zap_page() not free sp. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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@ -2863,13 +2863,16 @@ EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page_virt);
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void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
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{
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while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES &&
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int free_pages;
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free_pages = vcpu->kvm->arch.n_free_mmu_pages;
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while (free_pages < KVM_REFILL_PAGES &&
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!list_empty(&vcpu->kvm->arch.active_mmu_pages)) {
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struct kvm_mmu_page *sp;
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sp = container_of(vcpu->kvm->arch.active_mmu_pages.prev,
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struct kvm_mmu_page, link);
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kvm_mmu_zap_page(vcpu->kvm, sp);
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free_pages += kvm_mmu_zap_page(vcpu->kvm, sp);
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++vcpu->kvm->stat.mmu_recycled;
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}
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}
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