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[Qemu-devel] Re: Live migration protocol, device features, ABIs and othe
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts |
Date: |
Tue, 24 Nov 2009 16:35:23 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Tue, Nov 24, 2009 at 03:20:47PM +0100, Juan Quintela wrote:
> "Michael S. Tsirkin" <address@hidden> wrote:
>
> >> But to really make it work, we need to take a list of each savevm format
> >> change and put it here. Notice that several changes are needed:
> >> - savevm infrastructure save functions don't know about version id
> >> - devices don't know to "behave" as other version
> >> - other things that I have probably missed
> >>
> >> Later, Juan.
> >
> > Why do you think this the right place for it, I wonder?
> > This describes the machine, it does not seem to have
> > anything to do with how we migrate it.
>
> Becase here is where we know that _this_ machine had _this_ versions of
> each device.
So? migration format is not related to what devices
you have at all. It's how you save them.
> And this is also the trivial part to describe: I want a
> machine like the one in qemu-0.11.
Yes, but there might be a ton of reasons to want a
machine like the one in qemu 0.11.
The need to migrate to old qemu is very rare,
it is a completely separate decision
one might take long after starting qemu,
> What is more, it makes trivial for downstream to do things like:
> - I define my machine, called foo-7.0, and the changes that it has over
> any other machine.
>
> Later, Juan.
Yes, machine desacription is a good thing.
No, using it for things that have nothing to do with
describing the machine is not a good thing.
--
MST
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, (continued)
[Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/24
[Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Juan Quintela, 2009/11/23
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Anthony Liguori, 2009/11/23
- [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Juan Quintela, 2009/11/23
- [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/24
- [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Juan Quintela, 2009/11/24
- [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts,
Michael S. Tsirkin <=
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Gerd Hoffmann, 2009/11/25
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/25
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Gerd Hoffmann, 2009/11/25
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/25
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Gerd Hoffmann, 2009/11/25
- Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Andrea Arcangeli, 2009/11/26
Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Gerd Hoffmann, 2009/11/25
Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/25
Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Gerd Hoffmann, 2009/11/25
Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts, Michael S. Tsirkin, 2009/11/25