From e0c2b6338ac8ca30d438157dc45396c3c1148563 Mon Sep 17 00:00:00 2001 From: "Maciej S. Szmigiero" Date: Mon, 6 Dec 2021 20:54:23 +0100 Subject: [PATCH] KVM: x86: Don't call kvm_mmu_change_mmu_pages() if the count hasn't changed 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 Reviewed-by: Sean Christopherson Message-Id: <9e56b7616a11f5654e4ab486b3237366b7ba9f2a.1638817640.git.maciej.szmigiero@oracle.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 aaf89c001c5c..29a030a3c797 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11783,7 +11783,8 @@ 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));