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

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Message-ID: <6934efce0808211232i21fcf347vb6baa6502246adb2@mail.gmail.com>
Date:	Thu, 21 Aug 2008 12:32:13 -0700
From:	"Jared Hulbert" <jaredeh@...il.com>
To:	"Frans Meulenbroeks" <fransmeulenbroeks@...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!

Thanks.

> A few questions:

I meant to address these before.  Sorry.

> - 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)

I don't know, I'm interested to find out.  I just benchmarked that.
Actually it should work very well as a NAND-only fs.  Also you do get
something like XIP with NAND.  If you boot an XIP AXFS image on NAND
or a blkdev it will copy that XIP region into RAM and "XIP" it from
there.  I think this will make it very good for LiveCD's.  Though we
just (minutes ago) realized our testing of that feature was flawed, so
no guarantees.

> - would axfs be suitable as a filesystem on a ram disk?

It could be.  I plan on implementing support for brd.  That might work nicely.
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