nfs mounting problem

[Manjunath AM <Manjunath.AM@xxxxxxxxxxxx>]

Hi,

We are using MPC8272 based target board,
we are trying to mount montavista Linux version 2.6.10 kernel image (with
NFS enabled) to our target board,
we are setting following bootargs in
bootloader 

"setenv bootargs root=/dev/nfs
nfsroot=192.168.178.110:/opt/montavista/pro/devkit/ppc/82xx/target ip=192.168.178.234:192.168.178.110:192.168.178.47:255.255.255.0:cashel:eth1:off"

when we boot the board, it is not able
to mount nfs file system to board,  but the same image and configuration
works with MPC8272ADS board.
please suggest me, what could be the
problem.

Booting image at 00200000 ...
   Image Name:   Linux-2.6.10_mvl401-8272ads
   Image Type:   PowerPC
Linux Kernel Image (gzip compressed)
   Data Size:    948607
Bytes = 926.4 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ...
OK
   Uncompressing Kernel Image
... OK
Linux version 2.6.10_mvl401-8272ads
(root@em178110) (gcc version 3.4.3 (MontaVista 3.4.3-25.0.70.050
1961 2005-12-18)) #2 Tue Jan 23 16:54:50
IST 2007
Motorola PQ2 ADS PowerPC port
Built 1 zonelists
Kernel command line: root=/dev/nfs nfsroot=192.168.178.110:/opt/montavista/pro/devkit/ppc/82xx/targe
t ip=192.168.178.234:192.168.178.110:192.168.178.47:255.255.255.0:cashel:eth1:off
PID hash table entries: 128 (order:
7, 2048 bytes)
hr_time_init: arch_to_nsec = 83886080,
nsec_to_arch = 107374182
Warning: real time clock seems stuck!
Dentry cache hash table entries: 4096
(order: 2, 16384 bytes)
Inode-cache hash table entries: 2048
(order: 1, 8192 bytes)
Memory: 13952k available (1684k kernel
code, 468k data, 100k init, 0k highmem)
Mount-cache hash table entries: 512
(order: 0, 4096 bytes)
spawn_desched_task(00000000)
desched cpu_callback 3/00000000
ksoftirqd started up.
desched cpu_callback 2/00000000
desched thread 0 started up.
NET: Registered protocol family 16
Installing knfsd (copyright (C) 1996
okir@xxxxxxxxxxxx).
Initializing Cryptographic API
Serial: CPM driver $Revision: 0.01 $
ttyCPM0 at MMIO 0xf0011a00 (irq = 40)
is a CPM UART
ttyCPM1 at MMIO 0xf0011a60 (irq = 43)
is a CPM UART
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks
of 8192K size 1024 blocksize
loop: loaded (max 8 devices)
fs_enet.c:v1.0 (Aug 8, 2005)
Uniform Multi-Platform E-IDE driver
Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed
for PIO modes; override with idebus=xx
eth0: FCC ENET Version 0.3, 00:99:23:c4:ad:de
eth1: FCC ENET Version 0.3, 00:99:23:44:ad:de
eth2: FCC ENET Version 0.3, 00:99:23:64:ad:de
NET: Registered protocol family 2
IP: routing cache hash table of 512
buckets, 4Kbytes
TCP: Hash tables configured (established
1024 bind 2048)
NET: Registered protocol family 1
NET: Registered protocol family 17
IP-Config: Complete:
      device=eth1, addr=192.168.178.234,
mask=255.255.255.0, gw=192.168.178.47,
     host=cashel, domain=,
nis-domain=(none),
     bootserver=192.168.178.110,
rootserver=192.168.178.110, rootpath=
Looking up port of RPC 100003/2 on 192.168.178.110
portmap: server 192.168.178.110 not
responding, timed out
Root-NFS: Unable to get nfsd port number
from server, using default
Looking up port of RPC 100005/1 on 192.168.178.110
portmap: server 192.168.178.110 not
responding, timed out
Root-NFS: Unable to get mountd port
number from server, using default
mount: server 192.168.178.110 not responding,
timed out
Root-NFS: Server returned error -5 while
mounting /opt/montavista/pro/devkit/ppc/82xx/target
VFS: Unable to mount root fs via NFS,
trying floppy.
VFS: Cannot open root device "nfs"
or unknown-block(2,0)
Please append a correct "root="
boot option
Kernel panic - not syncing: VFS: Unable
to mount root fs on unknown-block(2,0)
 <0>Rebooting in 180 seconds..

Thanks and awaiting for your valuable
feedback



Thanks & Regards
 MANJUNATH AM