diff options
| author | Gleb Natapov <gleb@redhat.com> | 2009-08-24 12:54:26 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-12-03 10:32:08 +0300 |
| commit | 680b3648ba89c44ac8d0316f78a0d6e147b88809 (patch) | |
| tree | b2b40034c4c33affef8b89822673cca835874651 /arch/x86/kvm/i8254.c | |
| parent | eba0226bdfffe262e72b8360e4d0d12070e9a0f0 (diff) | |
| download | linux-680b3648ba89c44ac8d0316f78a0d6e147b88809.tar.xz | |
KVM: Drop kvm->irq_lock lock from irq injection path
The only thing it protects now is interrupt injection into lapic and
this can work lockless. Even now with kvm->irq_lock in place access
to lapic is not entirely serialized since vcpu access doesn't take
kvm->irq_lock.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8254.c')
| -rw-r--r-- | arch/x86/kvm/i8254.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 144e7f60b5e2..fab7440c9bb2 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -688,10 +688,8 @@ static void __inject_pit_timer_intr(struct kvm *kvm) struct kvm_vcpu *vcpu; int i; - mutex_lock(&kvm->irq_lock); kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 1); kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 0); - mutex_unlock(&kvm->irq_lock); /* * Provides NMI watchdog support via Virtual Wire mode. |