Re: [PATCH v1 0/2] Virtio: fix some vq allocation issues

[Wei Wang <wei.w.wang@intel.com>]

On 12/28/2018 03:57 PM, Christian Borntraeger wrote:
> On 28.12.2018 03:26, Wei Wang wrote:
> > Some vqs don't need to be allocated when the related feature bits are
> > disabled. Callers notice the vq allocation layer by setting the related
> > names[i] to be NULL.
> >
> > This patch series fixes the find_vqs implementations to handle this case.
> So the random crashes during boot are gone.
> What still does not work is actually using the balloon.
>
> So in the qemu monitor using lets say "balloon 1000"  will hang the guest.
> Seems to be a deadlock in the virtio-ccw code.  We seem to call the
> config code in the interrupt handler.

Please try with applying both this series and the "virtio-balloon: tweak 
config_changed"
series that I just sent.
This series fixes the ccw booting issue and that series tries to fix the 
ccw deadlock issue.

Best,
Wei