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Date: Wed, 9 Nov 2011 05:11:14 -0500
From: Christoph Hellwig <hch@infradead.org>
To: Arne Jansen <sensille@gmx.net>
Cc: Christoph Hellwig <hch@infradead.org>,
        Chris Mason <chris.mason@oracle.com>,
        Andrea Gelmini <andrea.gelmini@gmail.com>,
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Subject: Re: [GIT PULL] Btrfs pull request
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On Wed, Nov 09, 2011 at 10:06:55AM +0100, Arne Jansen wrote:
> That's... unexpected. I guess this won't change with 3.3? For 3.3 I have
> to rework that part from scrub to account for Chris' bigblocks. If it can
> wait that long I'd prefer to fix both at once. Chris?

device mapper has always been like that.  It makes splitting requests
over multiple targets a lot easier for them.  With increasin I/O sizes
that is something which will have to be fixed sooner or later, though.