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

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Date:	Thu, 21 Aug 2008 14:53:25 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	carsteno@...ibm.com, jaredeh@...il.com,
	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
Subject: Re: [PATCH 00/10] AXFS: Advanced XIP filesystem

On Thursday 21 August 2008, Nick Piggin wrote:
> On Thursday 21 August 2008 20:25, Carsten Otte wrote:
> > Jared Hulbert wrote:
> > > I'd like to get a first round of review on my AXFS filesystem.
> >
> > I like the general approach of it. It's much more flexible than the
> > ext2 extension I've done, and the possibility to select XIP vs.
> > compression per page is really really neat. I can imagine that people
> > will prefer this over the ext2 implementation on s390. It is unclear
> > to me how the "secondary block device" thing is supposed to work.
> > Could you elaborate a bit on that?
> 
> Agreed. I haven't had a good look through it yet, but at a glance it
> looks pretty neat. The VM side of things looks pretty reasonable
> (I fear XIP faulting might have another race or two, but that's a
> core mm issue rather than filesystem specific).

Yes, I also like the file system, I guess this is 2.6.28 material and
you should have it added to linux-next when you have addressed the
comments so far.

One thing that would be really nice is if you could add fake-write
support in the way that I proposed for cramfs a few months ago.
This would make axfs much more interesting for another set of
users, and keep cramfs a really simple example file system.

	Arnd <><
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