Re: VFS: Cannot open root device "31:03" or unknown-block(31,3)

In message [ref] you wrote:

ELDK-3.1.1 has a glibc compiled with support of a certain version of the 
kernel (I guess it's 2.4.xx), so newer kernels might run (because they are 

They do run.

obviously backwards compatible), but some features of 2.6 cannot be used 
(e.g. support for the latest syscalls, different HZ, etc...)

You can also change HZ if you like.

A second issue is the boot procedure. If you are a beginner with linux, you'd 
probably start booting from NFS root as it gets installed in the ELDK/ppc_xxx 
directory. That probably won't work very well with latest 2.6 kernels (device 
files missing, sysfs not mounted, shmfs has different name, etc...)

You can (mis-) configre  a  2.4  kernel  too.  Using  a  sane  kernel
configuration  ther  ewill  be  no  problems. We have been using ELDK
3.1.1 for a long time ourself developing 2.6 kernel code.

quoted

C++  programs  and  with  any version of the kernel tree (at least in
theory; very recent version s of the Linux kernel [ > 2.6.14]  cannot
be compiled with ELDK 3.1.x any more, but this is a different issue).

See what I mean? HappyPhot did just that: compile 2.6.14.2 with ELDK 3.1.1!!!

I wrote "> 2.6.14"; 2.6.14.2 is just a branch off 2.6.14 and is  fine
AFAICT.

quoted

The ELDK supports *any* kernel version.

Ok, let's talk about "recommended" kernel then. I would never recommend 

There is no recommended kernel version. On contrary,  we  take  great
efforts  to keep the ELDK independent of speicfic kernelk versions as
far as possible.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Quantum particles: The dreams that stuff is made of.