| From | "Maciej S. Szmigiero" <> | Subject | [PATCH v7 17/29] KVM: x86: Don't call kvm_mmu_change_mmu_pages() if the count hasn't changed | Date | Mon, 6 Dec 2021 20:54:23 +0100 |
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From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>
There is no point in calling kvm_mmu_change_mmu_pages() for memslot operations that don't change the total page count, so do it just for KVM_MR_CREATE and KVM_MR_DELETE.
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com> Reviewed-by: Sean Christopherson <seanjc@google.com> --- arch/x86/kvm/x86.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f25d224d21d9..13048683db60 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11832,7 +11832,8 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, const struct kvm_memory_slot *new, enum kvm_mr_change change) { - if (!kvm->arch.n_requested_mmu_pages) + if (!kvm->arch.n_requested_mmu_pages && + (change == KVM_MR_CREATE || change == KVM_MR_DELETE)) kvm_mmu_change_mmu_pages(kvm, kvm_mmu_calculate_default_mmu_pages(kvm));
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