setup-disk should detect vmware and add needed pax_nouderef to to extlinux.conf
alpine is currently broken on vmware by default:
http://forums.grsecurity.net/viewtopic.php?f=3&t=2191
We can detect vmware by looking at the disks:
http://www.dmo.ca/blog/detecting-virtualization-on-linux/
(from redmine: issue id 167, created on 2009-09-16, closed on 2009-09-22)