Re: [Qemu-devel] [PATCH 0/3] client_migrate_switch and auto_switch (RHBZ 725009)

[Gerd Hoffmann <kraxel@redhat.com>]

   Hi,

>> Ok, so I think we should be able to fix the race outlined above
>> without adding new monitor commands, just by letting libvirt set the
>> spice ticket in stage 2.
>
> Is that different then what I suggested in my reply to Daniel's 5 stage outline?

I think we have to care to not mix up switch-host and seamless spice 
client migration, your reply seems to refer top some seamless spice 
migration implementation ideas.

Today we seem to have this workflow:

    (1)  migration src->dst (stage 3)
    (2a) libvirt sets spice ticket at dst (not sure which stage)
    (2b) spice client switches connection to dst

2a and 2b are racing here.  I think we can fix the race by doing this 
instead:

   (1) libvirt sets spice ticket at dst (stage 2)
   (2) migration src->dst (stage 3)
   (3) spice client switches connection to dst

cheers,
   Gerd