Re: save image file format? and [RFC] tmem save/restore/migrate

[Stefano Stabellini <stefano.stabellini@eu.citrix.com>]

Tim Deegan wrote:

> At 13:26 +0100 on 18 Jun (1245331580), John Levon wrote:
>>> just layering for its own sake.  (Also, using qemu to save a PV guests 
>>> would be pretty wierd).
>> Why? We already use qemu for PV guests and that's only going to become
>> more common.
> 
> Is it?  AIUI the only thing we use qemu for in PV guests is the pvfb
> backend, which is just because nobody's put in a proper library
> interface to that code.


We also use it for the console backend when a vfb is given to the guest.

 
>>>> The qemu people are also maintaing save record compatibility now, so we
>>>> are safe from that perspective.
>>> Yes, but their code-defines-format model is rubbish.
>> Maybe now is the time to help them fix that? It's really no worse than
>> Xen's code-defines-format model, headers or not.
> 
> Qemu's code-defines-format model is actually much better than the
> xend/libxc code-defines-format model. :)  But that's not to say it's the
> thing we should be copying.

It is more about reusing than copying.