[PATCH 3/3] KVM: MMU: delay local tlb flush

From: Xiao Guangrong
Date: Tue Jun 08 2010 - 08:10:38 EST

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 <xiaoguangrong@xxxxxxxxxxxxxx>
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)
- kvm_x86_ops->tlb_flush(vcpu);
+ set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);

static void paging_new_cr3(struct kvm_vcpu *vcpu)

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