How to debug problems when nothing shows up in kvm_stat on kvm-88?

How to debug problems when nothing shows up in kvm_stat on kvm-88?

[Neo Jia]

hi,

I am running official kvm-88 release with my own 32-bit .so library
dlopen'ed by qemu-kvm. So it has 32-bit qemu-kvm on 64-bit kvm kernel
module. Everything works great but after a while the guest (winxp
32-bit) hard hangs and kvm_stat shows 0.

So, is there any way to trace back when the kvm_stat starts showing
0s? qemu-kvm is still alive.

Thanks,
Neo

-- 
I would remember that if researchers were not ambitious
probably today we haven't the technology we are using!

Re: How to debug problems when nothing shows up in kvm_stat on kvm-88?

[Avi Kivity]

On 03/31/2010 07:56 AM, Neo Jia wrote:
> hi,
>
> I am running official kvm-88 release

That's pretty old.  Suggest trying the latest kvm-kmod release (or 
latest kernel.org release with its native kvm modules) and qemu-kvm-0.12.3.

>   with my own 32-bit .so library
> dlopen'ed by qemu-kvm. So it has 32-bit qemu-kvm on 64-bit kvm kernel
> module. Everything works great but after a while the guest (winxp
> 32-bit) hard hangs and kvm_stat shows 0.
>
> So, is there any way to trace back when the kvm_stat starts showing
> 0s? qemu-kvm is still alive.
>
>    

Attach to qemu with gdb and see what the threads are doing.  Without 
information about your library (I assume it works without it) there's 
not much advice I can give.

-- 
error compiling committee.c: too many arguments to function