Hi,
As Brad said, if this is your own kernel then can you rebuild it with the
default options set. The kernel config requires 'CONFIG_ROOT_NFS=y'
for this boot method to work.
FYI I booted a DM355 with the following bootargs....
setenv bootargs 'mem=116M console=ttyS0,115200n8 noinitrd root=/dev/nfs rw
nfsroot=172.18.1.34:/tftpboot/remote_fs/dm355_rootfsdir_nfs ip=dhcp'
On the console the following appeared....
eth0: link down
Sending DHCP requests ., OK
IP-Config: Got DHCP answer from 172.18.0.254, my address is 172.18.128.92
IP-Config: Complete:
device=eth0, addr=172.18.128.92, mask=255.255.0.0, gw=172.18.0.254,
host=172.18.128.92, domain=trinity.local, nis-domain=(none),
bootserver=172.18.0.254, rootserver=172.18.1.34, rootpath=
Looking up port of RPC 100003/2 on 172.18.1.34
Looking up port of RPC 100005/1 on 172.18.1.34
VFS: Mounted root (nfs filesystem).
Freeing init memory: 180K
Can you also check the /var/log/messages file on the NFS host. You should see a
message like...
Sep 12 07:50:19 chrysler mountd[1989]: authenticated mount request from
172.18.128.92:800 for /tftpboot/remote_fs/dm355_rootfsdir_nfs (/tftpboot)
You have of course made the directory available (in /etc/exports), started the
nfs service & disabled the firewall (or otherwise allow NFS through).
[EMAIL PROTECTED] ~]# cat /etc/exports
/tftpboot *(rw,no_root_squash,sync)
What happens if you try to mount the file system from the host....in my case
that would be commands of the form...
[EMAIL PROTECTED] ~]# mkdir /mnt/nfs
[EMAIL PROTECTED] ~]# mount -t nfs
localhost:/tftpboot/remote_fs/dm355_rootfsdir_nfs /mnt/nfs
[EMAIL PROTECTED] ~]# ls /mnt/nfs
bin dev etc lib mnt proc sbin sys usr
boot home media opt root srv tmp var
Regards
Phil Q
Phil Quiney, Senior Software Engineer
Trinity Convergence
Cambridge Business Park
Cowley Road
Cambridge CB4 0WZ, UK
T: +44(0)1223-435536
F: +44(0)1223-435560
www.trinityconvergence.com <http://www.trinityconvergence.com/>
________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brad Bitterman
Sent: 12 September 2008 02:43
To: [EMAIL PROTECTED]
Cc: davinci-linux-open-source
Subject: Re: I have a problem when use the NFS which use to mount the filesys
Did you build your own kernel? Seems like NFS is turned off in the kernel.
- Brad
On Sep 11, 2008, at 9:20 PM, [EMAIL PROTECTED] wrote:
I have a problem when use the NFS which use to mount the filesys
this problem is
VFS: Cannot open root device "nfs" or unknown-block(0,255)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,255)
________________________________
2008-09-12
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