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From: David Woodhouse <dwmw2@infradead.org>
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To: Amit D Chaudhary <amit@muppetlabs.com>
Cc: Werner Almesberger <Werner.Almesberger@epfl.ch>, lermen@fgan.de,
        linux-kernel@vger.kernel.org
Subject: Re: /linuxrc query 
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Date: Fri, 23 Mar 2001 14:07:51 +0000
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amit@muppetlabs.com said:
>  Also as a note, what we are doing is keeping our rootfs on flash as a
> tar.gz and  reading it and mounting it on a ramfs in the /linuxrc
> before doing a pivot_root.  To summarize, pivot_root has been a life
> saver as the earlier real_root_dev  might not have been useful in this
> case. Not using the ramfs limits for now, will do soon.

If you're concerned about memory usage - why untar the whole of your root
filesystem into a ramfs? My preferred solution is to just mount the root
filesystem directly from the flash as cramfs (or JFFS2), with symlinks into a
ramfs for appropriate parts like /tmp and /var.

I suppose the best option is actually to union-mount the ramfs over the 
root, rather than mucking about with symlinks. I just haven't got round to 
doing that yet.

--
dwmw2


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