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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-08-30 12:26:33 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:51:59 +0200 |
| commit | 30644b902c5eef5328d37a2e15f1921aaca2588b (patch) | |
| tree | e8b00712784cfa6a3f4787443ba3a75eebbefb19 /arch/x86/kvm/mmu_audit.c | |
| parent | KVM: MMU: improve spte audit (diff) | |
| download | linux-30644b902c5eef5328d37a2e15f1921aaca2588b.tar.xz linux-30644b902c5eef5328d37a2e15f1921aaca2588b.zip | |
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.c | 7 |
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); |