[libvirt] [PATCH v12] support offline migration

[Daniel P. Berrange]

On Fri, Nov 02, 2012 at 09:30:27AM +0800, liguang wrote:
> original migration did not aware of offline case,
> so, try to support offline migration quietly
> (did not disturb original migration) by pass
> VIR_MIGRATE_OFFLINE flag to migration APIs if only
> the domain is really inactive, and
> migration process will not puzzled by domain
> offline and exit unexpectedly.
> these changes did not take care of disk images the
> domain required, for them could be transferred by
> other APIs as suggested, then VIR_MIGRATE_OFFLINE
> should not combined with VIR_MIGRATE_NON_SHARED_*.
> if you want a persistent migration,
> you should  do "virsh migrate --persistent" youself.
> 
> v12:
> rebased for conflicting with commit 2f3e2c0c434218a3d656c08779cb98b327170e11,
> and take in some messages from Doug Goldstein's patch
> https://www.redhat.com/archives/libvir-list/2012-October/msg00957.html

Great, the patch is now behaving exactly as I expect. I've only
one question - in the logs of libvirtd on the target host I always
see a warning message:

  2012-11-02 12:07:08.789+0000: 31375: warning : qemuDomainObjSetJobPhase:690 : 'migration in' async job is owned by thread 31374

I'm not sure what we're doing to trigger it, but I think we need
to find out & avoid it.

I would ack the patch if we can fix the warning

Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|