Re: [Qemu-devel] [PATCH v2 6/6] vmw_pvscsi: Introduce 'x-disable-pcie' backword compatability property

[Paolo Bonzini]

On 14/12/2015 18:35, Michael S. Tsirkin wrote:
> > What distinguishes an internal from an external property?  Everything
> > except links to backends would be "internal".
> 
> How do you mean? We have a ton of properties e.g.
> to control which offloads are allowed for virtio net.

Why would users set them?

> It's set internally by machine types to avoid breaking
> migration.  I don't see any reason for users to set it.

But they do set it :) albeit only through machine types.  I don't think
it's different from offloads, just much more specialized.

Or do you mean that it could go away if we decide to remove very old
machine types?  I think we would remove compat properties connected to
those machine types as well, even without "x-".

Paolo