[Fedora-xen] Install Xen on an F18 host without LVM

Hi, I just installed a minimal F18 host on which I want to run some guest hosts. Problem is that the minimal installation of Fedora 18 left out LVM. I could create a disc image for my guest host, but I am afraid that this comes with a performance penalty. The host system is already running Xen. Can anyone advice me on whether I'm better off reinstalling with LVM or that going without LVM is Okay? Thanks, Jeroen L