Kernel, initrd and root file system are extracted from working Fedora 9 disk image without any additional tinkering. Guest Fedora is clean and was installed from scratch. When I use this whole disk image with fullyvirtualized guest BIOS boot with, everything works fine. I also tried paravirtualized guest bootloader with another linux kernel and it also works fine. Xen version is 3.2.1-rc1-pre. Host OS is Ubuntu Hardy.
That Xen is too probably old - you need 3.3.x or newer. The Xen 3.2 in Fedora has a backport of this functionality, and I doubt the Ubuntu xen has copied that.
Thanks, I will try to do that. However, the sample for fullyvirtualized guest direct kernel boot uses Fedora.
I have tried to perform the same experiment with Xen 3.3.0, and the same error occured. Moreover, I have tried to use the kernel from my host Ubuntu (vmlinuz-2.6.24-21-server) and error was the same. However, using vmlinuz-2.6.24-21-xen kernel still worked fine, but in paravirtualized mode I suppose. All the kernels and initrds I have tried to use were taken from /boot/ without any additional modifications. Is it correct usage for full virtualization or some tuning should be performed? Or maybe Ubuntu as a host doesn't support full virtualization for direct kernel boot at all? -- Max