linux-kernel - Re: vm/fs meetup in september?

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Message-ID: <20070630093243.GD22354@infradead.org>
Date:	Sat, 30 Jun 2007 10:32:43 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Jared Hulbert <jaredeh@...il.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: vm/fs meetup in september?

On Tue, Jun 26, 2007 at 10:07:24AM -0700, Jared Hulbert wrote:
> If you have a large array of a non-volatile semi-writeable memory such
> as a highspeed NOR Flash or some of the similar emerging technologies
> in a system.  It would be useful to use that memory as an extension of
> RAM.  One of the ways you could do that is allow pages to be swapped
> out to this memory.  Once there these pages could be read directly,
> but would require a COW procedure on a write access.  The reason why I
> think this may be a vm/fs topic is that the hardware makes writing to
> this memory efficiently a non-trivial operation that requires
> management just like a filesystem.  Also it seems to me that there are
> probably overlaps between this topic and the recent filemap_xip.c
> discussions.

So what you mean is "swap on flash" ?  Defintively sounds like an
interesting topic, although I'm not too sure it's all that
filesystem-related.
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