From 30644b902c5eef5328d37a2e15f1921aaca2588b Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Mon, 30 Aug 2010 18:26:33 +0800 Subject: [PATCH] KVM: MMU: lower the aduit frequency The audit is very high overhead, so we need lower the frequency to assure the guest is running. Signed-off-by: Xiao Guangrong Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu_audit.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c index 3bde186409bf..bd2b1be7066e 100644 --- a/arch/x86/kvm/mmu_audit.c +++ b/arch/x86/kvm/mmu_audit.c @@ -17,6 +17,8 @@ * */ +#include + static const char *audit_msg; typedef void (*inspect_spte_fn) (struct kvm_vcpu *vcpu, u64 *sptep, int level); @@ -228,6 +230,11 @@ static void audit_vcpu_spte(struct kvm_vcpu *vcpu) static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, int audit_point) { + static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10); + + if (!__ratelimit(&ratelimit_state)) + return; + audit_msg = audit_point_name[audit_point]; audit_all_active_sps(vcpu->kvm); audit_vcpu_spte(vcpu); -- 2.20.1