Cannot start domU from NFS

[Nauzad Sadry <nauzad@gmail.com>]

Hello everyone
I have Xen-2.0.1 setup with dom0 starting from local disk.
I need to start domU from NFS
The NFS server works - both local and remote clients can use it.
But not domU 

Here is my config
======= /etc/xen/vm_config_nfs =========
kernel = "/boot/vmlinuz-2.6.9-xenU"
ramdisk = "/boot/initrd-fc3.img"
memory = 128
name = "VM-1"
nics=3
dhcp="dhcp"
root = "/dev/nfs"
nfs_server = "192.168.1.123"
nfs_root   = '/xen_nfs/root'
extra = "4 enforcing=0"
======================================

domU starts booting and hangs at mounting its root 

Here is the boot log

Using config file "/etc/xen/vm_config_nfs".
Started domain VM-1, console on port 9608
************ REMOTE CONSOLE: CTRL-] TO QUIT ********
Linux version 2.6.9-xenU (xenod@labyrinth.cl.cam.ac.uk) (
gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1 We
d Nov 17 22:29:37 GMT 2004
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000008000000 (usable)
128MB LOWMEM available.
DMI not present.
Built 1 zonelists
Kernel command line:  ip=:192.168.123.123:::VM-1:eth0:dhcp
root=/dev/nfs nfsroot=192.168.123.123:/xen_nfs/root 3 VMID=1
enforcing=0
Initializing CPU#0
PID hash table entries: 1024 (order: 10, 16384 bytes)
Xen reported: 1793.416 MHz processor.
Using tsc for high-res timesource
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 126148k/131072k available (1596k kernel code, 4860k reserved,
466k data, 92k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: AMD Opteron(tm) Processor 244 stepping 08
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
checking if image is initramfs... it is
Freeing initrd memory: 1061k freed
NET: Registered protocol family 16
Initializing Cryptographic API
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Xen virtual console successfully installed as tty
Event-channel device installed.
Starting Xen Balloon driver
xen_blk: Initialising virtual block device driver
xen_blk: Timeout connecting to device!
xen_net: Initialising virtual ethernet driver.
NET: Registered protocol family 2
IP: routing cache hash table of 1024 buckets, 8Kbytes
TCP: Hash tables configured (established 8192 bind 16384)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Incomplete network configuration information.
Freeing unused kernel memory: 92k freed
Red Hat nash version 4.1.18 starting
Mounted /proc filesystem
Mounting sysfs
Creating /dev
Starting udev
Creating root device
Mounting root filesystem
mount: error 6 mounting ext3
mount: error 2 mounting none
Switching to new root
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!
 <0>Rebooting in 1 seconds..Linux version 2.6.9-xenU (xen


On my NFS export, the etc/fstab is as follows
/xen_nfs/root        /                           ext3    defaults        1 1
none                    /dev/pts                devpts  gid=5,mode=620  0 0
none                    /proc                    proc    defaults        0 0
none                    /dev/shm              tmpfs   defaults        0 0
/dev/hda5             swap                    swap    defaults        0 0
/dev/cdrom           /mnt/cdrom           udf,iso9660 noauto,owner,kudzu,ro 0 0
/dev/fd0                /mnt/floppy           auto    noauto,owner,kudzu 0 0

Help will be really appreciated 

Thanks

Nauzad


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