Hi I gave the new Xen-4.6rc2 a spin on a CentOS 7 virtualisation guest (nested-xen). I haven't yet started testing guests, but rather looked at the install itself. One issue, I found, was with xenstored.service and the corresponding unit-file: [root at xencen7ws ~]# systemctl status xenstored xenstored.service - The Xen xenstore Loaded: loaded (/usr/lib/systemd/system/xenstored.service; disabled) Active: active (running) since Tue 2015-09-08 23:13:43 CEST; 13min ago Process: 757 ExecStartPre=/bin/mkdir -p /var/run/xen (code=exited, status=0/SUCCESS) Process: 753 ExecStartPre=/bin/rm -f /var/lib/xenstored/tdb* (code=exited, status=0/SUCCESS) Process: 740 ExecStartPre=/bin/grep -q control_d /proc/xen/capabilities (code=exited, status=0/SUCCESS) Main PID: 760 (xenstored) CGroup: /system.slice/xenstored.service └─760 /usr/sbin/xenstored Sep 08 23:13:43 xencen7ws.virtfinity.local xenstored[760]: TDB: tdb_open_ex: could not open file /var/lib/xenstored/tdb: No such file or directory Sep 08 23:13:43 xencen7ws.virtfinity.local xenstored[760]: Checking store ... Sep 08 23:13:43 xencen7ws.virtfinity.local xenstored[760]: Checking store complete. Sep 08 23:13:43 xencen7ws.virtfinity.local xenstored[760]: xenstored is ready Sep 08 23:13:43 xencen7ws.virtfinity.local systemd[1]: Started The Xen xenstore. As you can see, xenstored.service is running, but disabled by the package installation. This is, because xenstored.service apparently got overseen in the source-rpm's spec-file's post runtime/preun runtime. See diff [1] for details. Also, I think xenstored should write a pidfile. You might consider adding to /usr/lib/systemd/system/xenstored.service: PIDFile=/var/run/xenstored.pid and change ExecStart=/usr/sbin/xenstored to ExecStart=/usr/sbin/xenstored --pid-file /var/run/xenstored.pid $XENSTORED_ARGS Hope this helps, this is just a quick start. I'll continue checking and reporting during the next days. Regards, Thomas [1] diff -u rpmbuild-xen-4.6rc2x-3.el7-org/SPECS/xen.spec rpmbuild-xen-4.6rc2x-3.el7/SPECS/xen.spec --- rpmbuild-xen-4.6rc2x-3.el7-org/SPECS/xen.spec 2015-09-08 18:47:00.000000000 +0200 +++ rpmbuild-xen-4.6rc2x-3.el7/SPECS/xen.spec 2015-09-09 00:06:27.558344410 +0200 @@ -403,6 +403,7 @@ /bin/systemctl enable xen-qemu-dom0-disk-backend.service /bin/systemctl enable xen-init-dom0.service /bin/systemctl enable xenconsoled.service + /bin/systemctl enable xenstored.service # /bin/systemctl enable xendomains.service %endif @@ -422,6 +423,7 @@ /bin/systemctl disable xen-init-dom0.service /bin/systemctl disable xen-qemu-dom0-disk-backend.service /bin/systemctl disable xenconsoled.service + /bin/systemctl disable xenstored.service # /bin/systemctl disable xendomains.service %endif fi