[Fedora-xen] ENC: Error Xen

[Paul Wouters]

On Mon, 4 Dec 2006, Thiago Morais wrote:

> Hello All.
>
> Now, I got this error:
>
> Linux version 2.6.18-1.2849.fc6xen (brewbuilder at hs20-bc2-4.build.redhat.com)

This is booting a xenU right? not the dom0?

> Red Hat nash version 5.1.19 starting
> Mounting proc filesystem
> Mounting sysfs filesystem
> Creating /dev
> Creating initial device nodes
> Setting up hotplug.
> Creating block device nodes.
> Loading uhci-hcd.ko module
> USB Universal Host Controller Interface driver v3.0
> Loading ohci-hcd.ko module
> Loading ehci-hcd.ko module
> Loading jbd.ko module
> Loading ext3.ko module
> Loading scsi_mod.ko module
> SCSI subsystem initialized
> Loading sd_mod.ko module
> Loading scsi_transport_spi.ko module
> Loading mptbase.ko module
> Fusion MPT base driver 3.04.01
> Copyright (c) 1999-2005 LSI Logic Corporation
> Loading mptscsih.ko module
> Loading mptspi.ko module
> Fusion MPT SPI Host driver 3.04.01
> Creating root device.
> Mounting root filesystem.
> mount: could not find filesystem '/dev/root'

Your xenu kernel did not load the xenblk or xennet modules via initrd.

This is probably because you are booting a rootfs and not a disk image,
and you are using the initrd from the kernel-xen image installed on
the host (dom0), which got a re-tailored initrd image to suit its own
requirements, which exclude those xen virtual drivers (since its dom0
not xenu).

Easiest fix is to unpack the initrd, add the two xen modules from
/lib/modules/ add the insmod call in the "init" script of the initrd,
and repack the initrd image.

The real fix is for redhat to always include xennet and xenblk drivers
in the initrd for any kernel-xen initrd, even if it seems that the initrd
is installed on the dom0. Really, the space saved in the kernel or in the
initrd is not worth having to re-image the initrd for every new kernel-xen
you people package up. The package kernel-xen is meant for dom and xenu, so
please add the xennet and xenblk drivers in the initrd.

Paul