Re: RAM disk size

We had some trouble with ramdisk larger than 4096K when used as initial
ramdisks.  Don't remember if they have problems when just created, mounted
and used.  This occured with the Dan Malek kernels from late 1999, don't
know if MontaVista has addressed this issue.  The symptoms were that the
creation went fine but caused mysterious failures when mounted during boot.

jeff

----- Original Message -----
From: "Jim Lewis" <redacted>
To: "Mike Flynn" <redacted>
Cc: <redacted>
Sent: Saturday, May 06, 2000 12:12 PM
Subject: Re: RAM disk size

Hello Mike,

The default max ramdisk size is 4096K. You can change this using the
ramdisk_size boot parameter. You will definitely need to change this

default on

the target.

On the host, another way to create a ramdisk image is to use the loopback
filesystem. This will allow you to avoid having to change the Ramdisk-size

of

your development host. Take a look at the Loopback-Root-FS How-To.

-Jim

Mike Flynn wrote:

quoted

I need to flash an image larger than 4 megs to an Embedded Planet RPX

CLLF

quoted

(860T) board with 8 MB of flash. I'm having a problem making a RAM disk

file

quoted

image larger than 4 MB on a LinuxPPC host preceding the download to the
target:

mkfs -m 0 /dev/ram XXXX
or
mke2fs -c /dev/ram XXXX

 with XXXX anything more than 4000 returns the following message:

"Filesystem larger than apparent filesystem size.
Proceed anyway? (y,n)"

Proceeding "anyway" seems to work until any activity that would put more
than 4 MB in /dev/ram (mounted as /mnt) yields:

"No space left on device"

How do I get beyond this host limitation to use more of the available

flash

quoted

on the CLLF board?

Thanks,
Mike Flynn
Enerdyne Technologies

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