jk t

NFS booting setup for QSB

Discussion created by jk t on Jun 18, 2012
Latest reply on Jun 19, 2012 by jk t

Dear All,

I have taken the source code of linux kernel, uboot and rootfs (dir structure) and compiled separately without using LTIB. It is compiled successfully and booting is success using micro SD card. When I try to use the NFS booting, kernel panic error is thrown.


IP-Config: Got DHCP answer from, my address is
IP-Config: Complete:
device=eth0, addr=, mask=, gw=,
host=, domain=nimbeon3.com, nis-domain=(none),
bootserver=, rootserver=, rootpath=
Looking up port of RPC 100003/3 on
Looking up port of RPC 100005/3 on
Root-NFS: Server returned error -13 while mounting
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; here are the available partitions:
b300 3872256 mmcblk0 driver: mmcblk
b301 3544608 mmcblk0p1
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[<8003711c>] (unwind_backtrace+0x0/0xe0) from [<803da040>] (panic+0x68/0xdc)
[<803da040>] (panic+0x68/0xdc) from [<80008de4>] (mount_block_root+0x1bc/0x1fc)
[<80008de4>] (mount_block_root+0x1bc/0x1fc) from [<80009038>] (prepare_namespace+0x120/0x174)
[<80009038>] (prepare_namespace+0x120/0x174) from [<80008a3c>] (kernel_init+0x120/0x160)
[<80008a3c>] (kernel_init+0x120/0x160) from [<800338b4>] (kernel_thread_exit+0x0/0x8)


Kindly suggest how to resolve this, I have modified the uboot boot parameters also referred the 

http://imxcommunity.org/forum/topics/imx51-kernel-panic-while?commentId=4103961%3AComment%3A6911 post. But not working.