[gPXE] Booting xen-3.3 with gpxe as a multiboot image

[Stefan Hajnoczi]

A few things about native gPXE multiboot and Xen:

1. Are the multiboot modules compressed?  gPXE will not decompress
them so you should do that manually and serve up uncompressed vmlinuz
and initrd.img files.

2. Try loading the files in reverse order: initrd.img, vmlinuz, xen.
I remember a multiboot payload being sensitive to memory layout.  gPXE
will load images downwards in memory but sometimes software expects
ascending order.

Stefan