I''ve been trying to get Xen to see all my ram (28GB) and work with 32bit paravirtualized guests for the past 1.5 months. I have been unable to do so after exhausting all the suggestions given in the mailing lists. The closest I could get was by replacing the hypervisor with its 64bit version manually which did work but only Fedora 7 paravirtualized guests would install. It has been mentioned a few times here that a hypervisor update will be made eventually to update it to a 64bit hypervisor which would allow me to see my 28GB of ram and work with 32bit guests. I was thinking I should just put the server live creating guests with 16GB of ram available. What I wanted to know is when the update finally occurs, will I be able to simply do a yum update, reboot, and then all 28GB of ram will show and the previous guests will still continue to work? Will it be that simple? Thanks. Marco Jorge