On Thu, Dec 08, 2016 at 10:33:37AM +0100, Hoyer-Reuther, Christian wrote:
> I did some tests and I see the problem too.
> XenServer 6.5 SP1 with almost all patches (3 hosts in pool), FreeBSD 
> 11.0-RELEASE-p2, xe-guest-utilities-6.2.0_2 installed via pkg.
> First migration from host 3 to host 1 is ok.
> Some seconds later I start a new migration from host 1 to host 2 and when 
> migration finishes (as seen in XenCenter) then the VM switches to the VGABios 
> screen ("Plex86/Bochs VGABios (PCI) current-cvs 01 Sep 2016 ... 
> cirrus-compatible VGA is detected"). The VM seem to hang and does not 
> respond. In XenCenter I see that all the CPU's of the VM go up to 100 percent.
> Then after 17 minutes the VGABios screen disappears and I see the console, 
> the CPU usage as seen in XenCenter goes down. I logged in as root before I 
> started the first migration and root is still logged in. So it was a hang and 
> not a reboot.
> 20 minutes later I start a new migration from host 2 to host 3 and the 
> problem occurs again.
> This problem does not exist with 10.3-RELEASE on the same hosts.


So far I've only tested local migration (migration using the same host as 
and destination), and that seems to work fine (I've done +50 
consecutive migrations with only 10s separation between them). Is there a 
that you could also try to reproduce this with local migration?

Are you using the same exact hardware on the source and the destination? Are 
all using iSCSI as the disk backend for this VMs?

Thanks, Roger.
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