[PATCH v5.5 19/30] KVM: x86: Don't call kvm_mmu_change_mmu_pages() if the count hasn't changed
Sean Christopherson <[email protected]>
| Newsgroups | org.kernel.vger.kvm-ppc,dev.linux.lists.kvmarm,org.infradead.lists.kvm-riscv,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-riscv,org.kernel.vger.kvm,org.kernel.vger.linux-kernel,org.kernel.vger.linux-mips |
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| Message-ID | <[email protected]> |
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. Reviewed-by: Sean Christopherson <[email protected]> Signed-off-by: Maciej S. Szmigiero <[email protected]> Signed-off-by: Sean Christopherson <[email protected]> --- 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 80183f7eadeb..4b0cb7390902 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11836,7 +11836,8 @@ 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)); -- 2.33.1.1089.g2158813163f-goog