=item B<linux_vserver>
+This is printed for backwards compatibility with older virt-what which
+could not distinguish between a Linux VServer container guest and
+host.
+
+=item B<linux_vserver-guest>
+
This process is running in a Linux VServer container.
Status: contributed by Barış Metin
+=item B<linux_vserver-host>
+
+This process is running as the Linux VServer host (VxID 0).
+
+Status: contributed by Barış Metin and Elan Ruusamäe
+
+=item B<lxc>
+
+This process is running in a Linux LXC container.
+
+Status: contributed by Marc Fournier
+
=item B<kvm>
This guest is running on the KVM hypervisor using hardware
You might include this information in status and monitoring programs.
+=item System tuning (sometimes)
+
+You might use this program to tune an operating system so it runs
+better as a virtual machine of a particular hypervisor. However if
+installing paravirtualized drivers, it's better to check for the
+specific features your drivers need (eg. for the presence of PCI devices).
+
=back
=head1 SEE ALSO