Boot with NFS on MIPS32

Chris Craig chris at
Thu Dec 4 08:38:05 EST 2008

I believe you need to enable "Kernel level autoconfiguration" which is 
under Networking->Networking support->Networking options->TCP/IP 
networking (IP_PNP), and then you'll have a "Root file system on NFS" 
option (ROOT_NFS) available under Network File Systems.

Chris Craig
Microtronix Datacom Ltd.
9-1510 Woodcock Street
London ON  N6H 5S1
Toll-Free: (888) 690-0091 x253 (NA only)
Phone:     (519) 690-0091 x253

mike zheng wrote:
> Hi All,
> I have one MIPS32 embedded system with Linux Kernel Right
> now, I have problem to boot from NFS. The NFS server works fine. I am
> able to mount the directory from anther Linux work station. I attach
> the .config file, there maybe some config flags I forget to open.
> Thanks for your help,
> Mike
> Here is the kernel command line:
> ===========================
> Kernel command line: root=/dev/nfs rw
> nfsroot=
> ip=
> Here is the error:
> ===========================
> TCP cubic registered
> NET: Registered protocol family 1
> NET: Registered protocol family 10
> lo: Disabled Privacy Extensions
> IPv6 over IPv4 tunneling driver
> sit0: Disabled Privacy Extensions
> NET: Registered protocol family 17
> 802.1Q VLAN Support v1.8 Ben Greear <greearb at>
> All bugs added by David S. Miller <davem at>
> VFS: Cannot open root device "nfs" or unknown-block(0,255)
> Please append a correct "root=" boot option; here are the available partitions:
> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)
> ------------------------------------------------------------------------
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