Re: RAM disk size

[Jim Lewis <jlewis@mvista.com>]

Jeff Millar wrote:

> 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.

I just created and mounted an 8 M initial ramdisk on a CLLF. So I guess that
whatever the problem was, it is fixed now.
-Jim

>
>
> jeff
>
> ----- Original Message -----
> From: "Jim Lewis" <jlewis@mvista.com>
> To: "Mike Flynn" <mike.psc@connectnet.com>
> Cc: <linuxppc-embedded@lists.linuxppc.org>
> 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:
> >
> > > I need to flash an image larger than 4 megs to an Embedded Planet RPX
> CLLF
> > > (860T) board with 8 MB of flash. I'm having a problem making a RAM disk
> file
> > > 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
> > > on the CLLF board?
> > >
> > > Thanks,
> > > Mike Flynn
> > > Enerdyne Technologies
> > >
> >
> >
> >
> >
>


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