From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zach Brown <zab@zabbo.net>
Subject: Re: Use case for "loop: Issue O_DIRECT aio with pages"?
Date: Fri, 02 Mar 2012 09:52:45 -0500
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Cc: Dave Kleikamp <dave.kleikamp@oracle.com>,
	linux-fsdevel@vger.kernel.org, Chris Mason <chris.mason@oracle.com>
To: Ted Ts'o <tytso@mit.edu>
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> I'm confused though why the guests would be pointed at the loopback
> device, as opposed to just simply attaching to the file directly.  Or
> is this some kind of Xen limitation?

I certainly haven't a clue.  It sounds like it from Chris' message. 
Maybe some Xen folks could provide more detail.

- z