On Mon, Dec 14, 2015 at 07:04:33PM +0100, Paolo Bonzini wrote: > > > 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
Then we'll break users who set them directly for some reason. So x- means "not part of stable ABI". No?
