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KVM: MMU: lower the aduit frequency

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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>
This commit is contained in:
Xiao Guangrong 2010-08-30 18:26:33 +08:00 committed by Avi Kivity
parent eb2591865a
commit 30644b902c
1 changed files with 7 additions and 0 deletions
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7
arch/x86/kvm/mmu_audit.c
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@ -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);