If you upgrade from Oracle VM Server Release 3.3.1 using PVHVM and live migration, you must restart your virtual machines after the upgrade is complete.
Workaround: A fix is aviailable
with Xen package versions of
xen-4.3.0-55.el6.22.18
or later. For more
information, see Document ID 1948012.1, on
My Oracle Support at:
https://support.oracle.com/oip/faces/secure/km/DocumentDisplay.jspx?id=1948012.1.
Bug 20826023