[Xen-devel] Problem with VBD

[Pasi Kärkkäinen <pasik@xxxxxx>]

Hi!

$ xm create -n -f xmtest
Using config file "xmtest".
(vm
    (name testdomain)
    (memory 128)
    (image
        (linux
            (kernel /boot/vmlinuz-2.6.8-foo1-XenU)
            (ip :1.2.3.4:::tesmo:eth0:dhcp)
            (root '/dev/xda1 ro')
            (args 1)
        )
    )
    (device (vbd (uname phy:loop0) (dev xda1) (mode w)))
    (device (vif (mac aa:00:00:2f:d4:fb)))
)

That's how I create the domain.

The domain starts, and this is the console output before kernel panic:

<snip>
Xen virtual console successfully installed as tty
Event-channel device installed.
[XEN] Initialising virtual block device driver
XL VBD: can't get major 0 with name xvd
[XEN] Initialising virtual ethernet driver.
<snip>
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "xda1" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on unknown-block(2,0)


Is there something (driver?) missing from my unprivileged kernel? 

/dev/loop0 is set up correctly with ext2-image on host..

$ losetup /dev/loop0
/dev/loop0: [4805]:471449 (Debian-3.0r2.ext2)

$ xm list
Name              Id  Mem(MB)  CPU  State  Time(s)  Console
Domain-0           0      123    0  r----    470.8
testdomain         4      128    0  -----    144.6    9604

$ xm vbd-list testdomain
(blkdev (idx 0) (vdev 3329) (device 1792) (mode w) (dev xda1) (uname phy:loop0))

Thanks for your help!

-- Pasi Kärkkäinen
       
                                   ^
                                .     .
                                 Linux
                              /    -    \
                             Choice.of.the
                           .Next.Generation.


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