Booting target Linux device with NFS

1. apt-get install nfs-kernel-server
2. vim /etc/exports

   /path/to/your/NFS/rootfs *(rw,no_root_squash,async)

3. exportfs -a
4. Modify kernel config for target:
   [*] Networking support --->
   

   Networking options --->
   

   [*] IP: kernel level autoconfiguration

   File systems --->
   

   [*] Network File Systems --->
   

   <*> NFS client support
   [*] NFS client support for NFS version 3
   [*] Root file system on NFS

5. Change CONFIG_CMDLINE to:
   

   CONFIG_CMDLINE="root=/dev/nfs rw nfsroot=10.2.1.2:/data/nfs ip=10.2.1.1:10.2.1.2::255.255.0.0::eth2:off init=/linuxrc mem=256M console=ttyS0,38400"

   and boot with zImage. Or set u-boot bootargs:
   

   set bootargs root=/dev/nfs rw nfsroot=10.2.1.2:/data/nfs ip=10.2.1.1:10.2.1.2::255.255.0.0::eth2:off init=/linuxrc mem=256M console=ttyS0,38400;save

   and boot with uImage