linux-kernel - Re: [PATCH 00/10] AXFS: Advanced XIP filesystem

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Message-ID: <ac9c93b10808202332n2654884eh877848df2da59f20@mail.gmail.com>
Date:	Thu, 21 Aug 2008 08:32:08 +0200
From:	"Frans Meulenbroeks" <fransmeulenbroeks@...il.com>
To:	jaredeh@...il.com
Cc:	Linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	"Jörn Engel" <joern@...fs.org>,
	tim.bird@...sony.com, cotte@...ibm.com, nickpiggin@...oo.com.au
Subject: Re: [PATCH 00/10] AXFS: Advanced XIP filesystem

Jared, nice work!

I've also read your paper from the linux symposium
(http://ols.fedoraproject.org/OLS/Reprints-2008/hulbert-reprint.pdf)

A few questions:
- how does this benchmark compared to cramfs and squashfs in a NAND-only system
  (or is it just not a good plan to use this with NAND-only (of course
I won't get XIP with NAND, I understand that)
- would axfs be suitable as a filesystem on a ram disk?

Background for the last question is that if you do not have the memory
to retain all pages uncompressed (as you would with ramfs), this could
be a nice intermediate format.
Furthermore compared to ramfs, a filesystem on a ramdisk does not need
the initialisation during startup (decompressing the cpio file,
creating the files, copying the data), so when it comes to boot times
a filesystem on a ramdisk (e.g. axfs) could be a better choice.

Appreciate your feedback.

Frans.
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