Can I use my IBM System x3950 for Xen guests?

Release found: Red Hat Enterprise Linux 5

Resolution:

The hypervisor included in Red Hat Enterprise Linux 5.0 release of Virtualization is not NUMA-aware, so its performance on NUMA machines may be sub-optimal. Hence running Xen guests on System x3950 is not recommended. Red Hat is working towards addressing this issue in a future update of Red Hat Enterprise Linux 5.