On 15/12/2014 14:37, Dr. David Alan Gilbert wrote: >> > Right, the question is whether you really want to do this. :) > Well, it would solve this type of problem less painfully, your migration > would always succeed and destinations that knew what to do with it would > always do the right thing.
Yes, that's a determination to make. I agree that this particular case is one where losing the subsection is not the end of the world, and keying off the machine type could be a good call for downstreams. But that's also because downstreams can also patch older source versions, while QEMU will not release another 2.1 version. In fact... > Of course you could also solve the problem > if the source knew the version of the destination, but you didn't like > that idea either. ... if the source could be patched by someone to know the version of the destination, they could also add the subsection with a "needed" function that always returns 0. This way it is never migrated, but it is interpreted. You do not need the version of the destination. Paolo
