Messages in this thread Patch in this message | | | Date | Mon, 30 Aug 2010 18:26:33 +0800 | From | Xiao Guangrong <> | Subject | [PATCH v2 5/5] 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 running
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> --- 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 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); -- 1.7.0.4
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