boot issue.

[Peter Menzebach]

Hi,

Lakshmi N. Sundararajan wrote:
> I have a compressed ext2 filesystem on a FLASH partition which I would
> like
> to use as a root file system mounted in RAM. The FLASH is accessed via
> MTD layer.
So you have *no* filesystem in the flash, but a compressed image. This 
is not usable as a filesystem directly in this format. Afaik, only the 
initrd code can use this...

> The kernel parameters are "console=ttyS0,115200  noinitrd mem=128M
> root=/dev/mtdblock5"
> But kernel panics saying "VFS: Cannot mount root unknown device (31,5)".
> 
which is correct, since there is no fs there...

> If I were to use cramfs on FLASH and use the same kernel command line,
> I am able to bringup the system.I am using 2.6 linux.
which would save the RAM space. You can still put some directories into 
RAM...

> Would anyone know about this issue? Is there any thing I got to do?
> Any pointers would be helpful.
The only solution I know is (assuming parallel flash) to give the 
compressed image as an initrd=<address>,<size> to the kernel.


Best regards
Peter
-- 
Peter Menzebach
Menzebach und Wolff IT-Consulting GbR
Phone +49 751 355 387 1