From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: [PATCH 4/4] KVM: MMU: lower the aduit frequency Date: Sat, 28 Aug 2010 20:03:00 +0800 Message-ID: <4C78FAF4.4070302@cn.fujitsu.com> References: <4C78FA00.8090606@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , LKML , KVM To: Avi Kivity Return-path: In-Reply-To: <4C78FA00.8090606@cn.fujitsu.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org The audit is very high overhead, so we need lower the frequency to assure the guest running Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu_debug.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/mmu_debug.c b/arch/x86/kvm/mmu_debug.c index c4ebe6a..bc61b3d 100644 --- a/arch/x86/kvm/mmu_debug.c +++ b/arch/x86/kvm/mmu_debug.c @@ -18,6 +18,7 @@ */ #include +#include static struct dentry *debugfs_file; static bool mmu_debug; @@ -233,6 +234,11 @@ static void audit_vcpu_spte(struct kvm_vcpu *vcpu) static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, const char *msg) { + static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10); + + if (!__ratelimit(&ratelimit_state)) + return; + audit_msg = msg; audit_all_active_sps(vcpu->kvm); audit_vcpu_spte(vcpu); -- 1.7.0.4