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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>
This commit is contained in:
Gleb Natapov 2009-07-07 15:27:32 +03:00 committed by Avi Kivity
parent 1000ff8d89
commit c7f0f24b1f
1 changed files with 1 additions and 0 deletions
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arch/x86/kvm/x86.c
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@ -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;