[CentOS-virt] Xen 4.6.6-9 (with XPTI meltdown mitigation) packages making their way to centos-virt-xen-testing

I've built & tagged packages for CentOS 6 and 7 4.6.6-9, with XPTI "stage 1" Meltdown mitigation. This will allow 64-bit PV guests to run safely (with a few caveats), but incurs a fairly significant slowdown for 64-bit PV guests on Intel boxes (including domain 0). If you prefer using Vixen /

[CentOS-virt] Centos 6 2.6.32-696.18.7.el6.x86_64 does not boot in Xen PV mode

Is this now fixed in the latest release by updating the hypervisor, the same as CentOS 7? Or does this require something further? I came across https://access.redhat.com/solutions/3312501 which seems to suggest Redhat are working on resolving the issue, so if that's the case then maybe the