From: Gleb Natapov <gleb@redhat.com>
To: avi@redhat.com
Cc: mtosatti@redhat.com, kvm@vger.kernel.org
Subject: [PATCH] No need to kick cpu if not in a guest mode.
Date: Tue, 7 Jul 2009 15:27:32 +0300 [thread overview]
Message-ID: <20090707122732.GG28046@redhat.com> (raw)
This will save a couple of IPIs.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index efb0b68..1e30400 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3498,6 +3498,7 @@ 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;
--
Gleb.
next reply other threads:[~2009-07-07 12:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-07 12:27 Gleb Natapov [this message]
2009-07-07 14:56 ` [PATCH] No need to kick cpu if not in a guest mode Marcelo Tosatti
2009-07-07 15:39 ` Avi Kivity
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