about using ubuntu core 14.01 rootfs as nfs with 3.14.38 kernel

Hi,

when I try to follow below guide setup an nfs for ubuntu core on 3.14.38 kernel for ARM based device, the boot stuck at
stopping system v runlevel compatibility [OK].

the kernel I am using is from
http://cdimage.ubuntu.com/ubuntu-core/releases/14.04/release/ubuntu-core-14.04.1-core-armhf.tar.gz

is it a kernel issue or ubuntu rootfs issue?

Regards,

Hake