[Libguestfs] [PATCH 7/7] v2v: add support for SUSE VMDP drivers

[Cedric Bosdonnat]

On Tue, 2016-04-05 at 15:52 +0300, Roman Kagan wrote:
> On Tue, Apr 05, 2016 at 01:47:33PM +0200, Cédric Bosdonnat wrote:
> > To add this support, the existing code searches for either the
> > viostor
> > or the VMDP (Virtual Machine Driver Pack) files and updates the
> > registry
> > accordingly.
> > 
> > Note that VMDP's block driver pvvxblk depends on the ballooning
> > driver
> > pvvxbn.
> 
> Can you please elaborate on this?  Is the balloon driver *used* by
> the
> storage driver so that the latter won't work without the former? 
>  What
> will happen if the virtio-balloon device isn't configured in the VM?

It's just that without the virtio balloon driver installed, the virtio
block one won't start properly, resulting in the famous 0x7B error.

> Or is it just a matter of ordering of the balloon driver within the
> driver start sequence, so that it can get its hands on the system as
> early as possible for its own purposes, and the storage driver
> doesn't
> require balloon's presence?

It's not ordering, it really requires it.

--
Cedric