It means that SMT is off, so no worries.
If SMT was on then Xen would assign dom0 to vcpus 1, 3, 5 and 7 as well, but since it’s off those aren’t available.
It means that SMT is off, so no worries.
If SMT was on then Xen would assign dom0 to vcpus 1, 3, 5 and 7 as well, but since it’s off those aren’t available.