On Fri, May 02, 2008 at 10:39:25PM +0200, Aurelien Jarno wrote:
> Hi,
>
> Since commit a0d22c57fbf0c67d73ab7ca3416841030e0bc22f, FreeBSD guests
> takes all host CPU even when they are idle. Reverting this patch in
> kvm-67 or git tree fixes (or workarounds?) the problem. Using
> -no-kvm-pit also workarounds the problem.
>
> Some more details:
> Host: Linux 2.6.24 x86-64
> CPU: problem occurs on T7500 and Q9450
> Guest: problem occurs with FreeBSD/i386 6.2 and 6.3
>
> Regards,
> Aurelien
Aurelien,
Can you give this a try.
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 1646102..07f9ff1 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -216,7 +216,7 @@ int pit_has_pending_timer(struct kvm_vcpu *vcpu)
{
struct kvm_pit *pit = vcpu->kvm->arch.vpit;
- if (pit && vcpu->vcpu_id == 0)
+ if (pit && vcpu->vcpu_id == 0 && pit->pit_state.inject_pending)
return atomic_read(&pit->pit_state.pit_timer.pending);
return 0;
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