"Dr. David Alan Gilbert" <dgilb...@redhat.com> writes: > * Paolo Bonzini (pbonz...@redhat.com) wrote: [...] >> Version numbers open a huge compatibility can of worms (what is a version >> number?) > > No, a version number here is very well defined; it's the output of > query-version' > (or 'info version' for the HMP world).
Okay, make it "version numbers are a huge, well-defined compatibility can of worms" :) > How you do comparisons on that, and in particular how you parse the 'package' > text is a different matter, however I suggest that parsing the 'package' > text is downstream's problem and they provide that text. This means that a downstream has to examine and possibly adapt the version number conditionals when it backports anything. >> and don't solve the fundamental problem of migration receiving >> insufficient testing with upstream QEMU versions. > > Indeed; and it's not meant to - in no way is this an excuse for inadequate > testing - however, we're all human, and bugs happen, this is just providing > a way to get out of some of the mess afterwards. Understand. It's a last resort, to be used only when the alternatives are all even worse. If we put this in, we'll have to review all attempts to use it very critically: is there really, really no practical alternative? Can you explain why we should put it in before we have a user?
