I was playing with xen on monster server at work (4 dual core opterons). I''ve got FC6 x86_64 Dom0 on it, and tried to install a fully virtualized FC6 i386 guest (to test running 32 bit kernels). I first tried telling it to use 2 cpus for the new machine (creating it via virt-manager) and when the installer loads the initial linux kernel from the boot DVD, it just goes into a blank stare right after the kernel mentions it is bringing up 2 cpus. If I try again and tell it only 1 cpu, everything works great. Is this any kind of know problem? Should I report a bug anywhere?