From: Peter Menzebach <pm-mtd@mw-itcon.de>
To: "Lakshmi N. Sundararajan" <lakshmi.s@promise.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: boot issue.
Date: Tue, 21 Mar 2006 10:14:04 +0100 [thread overview]
Message-ID: <441FC3DC.4000909@mw-itcon.de> (raw)
In-Reply-To: <B70A50D07063384EB9BCE3330D18414F024CCD28@nonameb.ptu.promise.com>
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
next prev parent reply other threads:[~2006-03-21 9:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-21 0:06 boot issue Lakshmi N. Sundararajan
2006-03-21 9:14 ` Peter Menzebach [this message]
2006-03-21 16:13 ` trimarchi
-- strict thread matches above, loose matches on Subject: below --
2006-03-21 20:39 Lakshmi N. Sundararajan
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