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Live Migrations No Longer Working After January 2019 Updates

We have a problem after the January updates (50 plus blades with AMD Bulldozer Family 15h processors) We have 400 plus VMs hosted on our hyper v clusters (Server 2012R2 and SCVMM 2012r2), and after January updates can no longer live migrate. We have put
the KB4490512 update on one of the hosts but it requires a reboot, which in turn would require us to power down our VMs as we are unable to migrate them off now.  Is there/will there be a fix to enable us to not have to reboot the hosts? 
or is there/ will there be a workaround to enable us to live migrate the vms ?

Hopefully there will be as this will cause a lot of business disruption.

Any help would be much appreciated

Regards

Andrew

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