Re: [Qemu-devel] [PULL 42/43] piix4: add acpi pci hotplug support

[Paolo Bonzini]

Il 15/10/2013 16:54, Michael S. Tsirkin ha scritto:
> > > Seemed cleaner not to.
> > 
> > It certainly would be if we had a self-descriptive migration stream format.
> > 
> > However, what we have is "send bytes, parse them on the destination,
> > hope the format matches".  Hence, anything that makes the format less
> > declarative adds to the complication and complicates debugging.  This is
> > the same reason why I prefer a subsection for the new hotplug stuff---it
> > makes the format more declarative and self-descriptive.
> 
> I understand for the subsection but why is removing
> useless bytes from there making it less descriptive?

Because the same version can have multiple formats depending on a datum
that is not part of the migration stream.

Paolo