summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/mmu_audit.c
diff options
context:
space:
mode:
authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2010-08-30 18:26:33 +0800
committerAvi Kivity <avi@redhat.com>2010-10-24 10:51:59 +0200
commit30644b902c5eef5328d37a2e15f1921aaca2588b (patch)
treee8b00712784cfa6a3f4787443ba3a75eebbefb19 /arch/x86/kvm/mmu_audit.c
parenteb2591865a234c6fb1162085d9b277236fa890b6 (diff)
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 <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu_audit.c')
-rw-r--r--arch/x86/kvm/mmu_audit.c7
1 files changed, 7 insertions, 0 deletions
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 <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);