From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: [PATCH 3/3] KVM: MMU: delay local tlb flush Date: Tue, 08 Jun 2010 20:07:01 +0800 Message-ID: <4C0E3265.4020601@cn.fujitsu.com> References: <4C0E31F1.70803@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , LKML , KVM list To: Avi Kivity Return-path: In-Reply-To: <4C0E31F1.70803@cn.fujitsu.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org delay local tlb flush until enter guest moden, it can reduce vpid flush frequency and reduce remote tlb flush IPI(if KVM_REQ_TLB_FLUSH bit is already set, IPI is not sent) Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 7319098..75ddaa1 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2362,7 +2362,7 @@ static int nonpaging_init_context(struct kvm_vcpu *vcpu) void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu) { ++vcpu->stat.tlb_flush; - kvm_x86_ops->tlb_flush(vcpu); + set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests); } static void paging_new_cr3(struct kvm_vcpu *vcpu) -- 1.6.1.2