linux-kernel - Re: [PATCH][RFC] fast file mapping for loop

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Date:	Thu, 10 Jan 2008 08:54:59 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	linux-kernel@...r.kernel.org, chris.mason@...cle.com,
	linux-fsdevel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH][RFC] fast file mapping for loop

On Thu, Jan 10, 2008 at 09:44:57AM +0100, Jens Axboe wrote:
> > IMHO this shouldn't be done in the loop driver anyway.  Filesystems have
> > their own effricient extent lookup trees (well, at least xfs and btrfs
> > do), and we should leverage that instead of reinventing it.
> 
> Completely agree, it's just needed right now for this solution since all
> we have is a crappy bmap() interface to get at those mappings.

So let's fix the interface instead of piling crap ontop of it.  As I
said I think Peter has something to start with so let's beat on it
until we have something suitable.   If we aren't done by end of Feb
I'm happy to host a hackfest to get it sorted around the fs/storage
summit..

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