Re: [Qemu-devel] migration: new sections and backward compatibility.

[Paolo Bonzini]

On 07/11/2011 05:32 PM, Kevin Wolf wrote:
> > >  I'd guess the best would be to have a special VMSTATE that means
> > >  "broken old version doesn't send a section" which we can set for
> > >  special -M?
> >
> >  No, the best would be to have a serious migration format, based for
> >  example on ASN.1 which Michael Tsirkin was playing with.  We cannot keep
> >  bolting more and more stuff on top of the current protocol, especially
> >  since adding a new protocol is not that hard (old machine types can keep
> >  the old protocol).
>
> And even more so with the old format being ambiguous. We haven't decided
> yet what to do with subsections of structs, have we?

I hope to test this week the prototype I sent.

Paolo