Re: [Qemu-devel] [RFC] QEMU Live Migration

[Fabrice Bellard]

I looked at your patch and it is OK for me. The 'ssh:' implementation is 
a nice trick. In order to be usable on win32, it is still needed to 
implement a more portable system with a TCP connection.

The dirty flag 0x04 is unfortunately used by kqemu - I should have 
documented it ! You can use 0x08 for the live migration.

Regards,

Fabrice.

Anthony Liguori wrote:
> Howdy,
>
> I wanted to post a draft of my QEMU live migration patch.  I think 
> there's a lingering memory allocation problem.  I also need to implement 
> ARP forwarding and a TCP transport stream.
>
> However, I thought I'd post an initial version in case anyone wants to 
> play around with it.
>
> Once you apply the patch, make sure you've got it on both machines.  For 
> my setup, I've got a common NFS share mounted in /mnt.  Then I run:
>
> qemu -hda /mnt/win2k.img -monitor telnet:0.0.0.0:1025,server,nowait -vnc :2
>
> Then, I connect to the monitor and execute:
>
> (qemu) migrate ssh://woolly
>
> When the migration completes, the monitor command will finish and then I 
> can connect to the machine on woolly:2.
>
> The ssh command will be derived from argc/argv so it's important to 
> ensure that the -hda path is valid on both machines.
>
> All three patches are required and should be applied in order of: 
> qemu-apic-save-restore.diff qemu-file.diff qemu-migration.diff
>
> Regards,
>
> Anthony Liguori