[Qemu-devel] Re: Lost interrupts with upstream KVM

[Gleb Natapov]

On Fri, May 29, 2009 at 10:23:24AM +0200, Jan Kiszka wrote:
> Hi Gleb,
> 
> with latest kernel modules, namely beginning with 6bc0a1a235 (Remove
> irq_pending bitmap), I'm loosing interrupts with upstream's KVM support.
> After some bisecting, hair-pulling and a bit meditation I added a
> WARN_ON(kvm_cpu_has_interrupt(vcpu)) to kvm_vcpu_ioctl_interrupt, and it
> actually triggered right before the guest got stuck.
> 
> This didn't trigger with qemu-kvm (and -no-kvm-irqchip) yet but, on the
> other hand, I currently do not see a potential bug in upstream's
> kvm_arch_pre_run. Could you have a look if you can reproduce,
> specifically if this isn't a KVM kernel issue in the end?
> 
In kvm_cpu_exec() after calling kvm_arch_pre_run() env->exit_request is
tested and function can exit without calling kvm_vcpu_ioctl(KVM_RUN).
Can you check if this what happens in your case?

--
                        Gleb.