KVM: No need to kick cpu if not in a guest mode

This will save a couple of IPIs. Signed-off-by: Gleb Natapov <gleb@redhat.com> Acked-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
mariux64 · Sep 10, 2009 · c7f0f24 · c7f0f24
1 parent 1000ff8
commit c7f0f24
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
@@ -3506,6 +3506,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 	smp_mb__after_clear_bit();
 
 	if (vcpu->requests || need_resched() || signal_pending(current)) {
+		set_bit(KVM_REQ_KICK, &vcpu->requests);
 		local_irq_enable();
 		preempt_enable();
 		r = 1;