From: Christoph Hellwig <hch@infradead.org>
To: carsteno@de.ibm.com
Cc: Christoph Hellwig <hch@infradead.org>,
Jared Hulbert <jaredeh@gmail.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Andrew Morton <akpm@linux-foundation.org>,
richard.griffiths@windriver.com,
Richard Griffiths <res07ml0@verizon.net>,
Linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP
Date: Fri, 8 Jun 2007 08:57:17 +0100 [thread overview]
Message-ID: <20070608075717.GA16927@infradead.org> (raw)
In-Reply-To: <46690A39.3010402@de.ibm.com>
On Fri, Jun 08, 2007 at 09:50:17AM +0200, Carsten Otte wrote:
> I see your poing with regard to layering, and I agree to it.
> In order to do ioremap/iounmap at least we need a counterpart
> put_xip_page thing to do iounmap in that path. Our dcss segments on
> 390 did not raise that requirement: they had a permanent kernel mapping.
> The quiz question to me is: why don't we establish a permanenet
> mapping of the entire thing from mount() to unmount(). That eliminates
> the need to do iomap/iounmap, eliminates the need to have
> put_xip_page, and eliminates to care about what layer would do this.
> Would work for cramfs, won't work for read+write flash filesystems.
Jared's patch currently does ioremap on mount (and no iounmap at all).
That mapping needs to move from the filesystem to the device driver.
next prev parent reply other threads:[~2007-06-08 8:10 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-22 22:09 [PATCH 2.6.21] cramfs: add cramfs Linear XIP Richard Griffiths
2007-05-22 22:49 ` Andrew Morton
2007-05-22 22:58 ` Richard Griffiths (wrs)
2007-05-23 7:51 ` Carsten Otte
2007-05-23 15:25 ` Richard Griffiths (wrs)
2007-05-24 6:46 ` Carsten Otte
2007-05-23 17:21 ` Jared Hulbert
2007-05-24 6:57 ` Carsten Otte
2007-05-29 5:10 ` Nick Piggin
2007-06-02 0:48 ` Jared Hulbert
2007-06-02 8:42 ` Nick Piggin
2007-06-04 13:32 ` Carsten Otte
2007-06-06 11:13 ` Jared Hulbert
2007-06-06 11:33 ` Christoph Hellwig
2007-06-06 15:17 ` Richard Griffiths
2007-06-06 15:50 ` Christoph Hellwig
2007-06-06 16:09 ` Jared Hulbert
2007-06-06 16:07 ` Jared Hulbert
2007-06-06 16:16 ` Christoph Hellwig
2007-06-06 18:26 ` Jared Hulbert
2007-06-07 19:37 ` Christoph Hellwig
2007-06-07 19:40 ` Christoph Hellwig
2007-06-07 20:27 ` Jared Hulbert
2007-06-08 7:39 ` Carsten Otte
2007-06-07 21:11 ` Jared Hulbert
2007-06-07 21:15 ` Christoph Hellwig
2007-06-07 22:59 ` Jared Hulbert
2007-06-08 13:19 ` Jörn Engel
2007-06-08 13:10 ` Jörn Engel
2007-06-06 16:15 ` Carsten Otte
2007-06-06 16:23 ` Christoph Hellwig
2007-06-06 18:40 ` Jared Hulbert
2007-06-06 22:59 ` Matt Mackall
2007-06-07 17:07 ` Carsten Otte
2007-06-07 19:38 ` Christoph Hellwig
2007-06-07 20:34 ` Jared Hulbert
2007-06-08 7:28 ` Christoph Hellwig
2007-06-08 16:02 ` Jared Hulbert
2007-06-08 7:17 ` Carsten Otte
2007-06-08 7:26 ` Christoph Hellwig
2007-06-08 7:50 ` Carsten Otte
2007-06-08 7:57 ` Christoph Hellwig [this message]
2007-06-08 7:59 ` Carsten Otte
2007-06-08 8:04 ` Christoph Hellwig
2007-06-08 16:05 ` Jared Hulbert
2007-06-08 16:09 ` Christoph Hellwig
2007-06-08 16:11 ` Jared Hulbert
2007-06-08 16:15 ` Christoph Hellwig
2007-06-08 17:51 ` Jörn Engel
2007-06-08 19:04 ` Carsten Otte
2007-06-08 19:06 ` Carsten Otte
2007-06-08 19:36 ` Jörn Engel
2007-06-09 7:55 ` Carsten Otte
2007-06-09 10:37 ` Jörn Engel
2007-06-08 23:02 ` Jared Hulbert
2007-06-07 21:19 ` Jared Hulbert
2007-06-06 12:05 ` Carsten Otte
2007-06-06 19:01 ` Jared Hulbert
2007-06-07 1:00 ` Justin Treon
2007-06-13 0:11 ` Jared Hulbert
2007-06-14 13:57 ` Carsten Otte
2007-06-14 16:53 ` Jared Hulbert
2007-06-15 9:22 ` Carsten Otte
2007-06-15 11:49 ` Heiko Carstens
2007-06-15 17:30 ` Jared Hulbert
2007-06-18 7:38 ` Carsten Otte
2007-06-15 13:53 ` Carsten Otte
2007-06-15 21:46 ` Jared Hulbert
2007-05-23 8:21 ` Alistair John Strachan
2007-05-24 20:22 ` Jared Hulbert
2007-05-24 20:52 ` Richard Griffiths
2007-05-24 21:21 ` Jared Hulbert
[not found] <337240.79058.qm@web59309.mail.re1.yahoo.com>
2007-06-09 8:09 ` Carsten Otte
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