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

[Kevin Wolf]

Am 07.07.2011 17:23, schrieb Paolo Bonzini:
> On 07/07/2011 01:02 PM, Alexander Graf 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?

Kevin