[v2,5/5] KVM: MMU: lower the aduit frequency

Commit Message

Xiao Guangrong Aug. 30, 2010, 10:26 a.m. UTC

None

Patch

diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c
index 3bde186..bd2b1be 100644
--- a/arch/x86/kvm/mmu_audit.c
+++ b/arch/x86/kvm/mmu_audit.c
@@ -17,6 +17,8 @@ 
  *
  */
 
+#include <linux/ratelimit.h>
+
 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);