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Date: Thu, 21 Nov 2013 01:58:37 -0800
From: Christoph Hellwig <hch@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Kleikamp <dave.kleikamp@oracle.com>,
        Christoph Hellwig <hch@infradead.org>,
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        Kent Overstreet <kmo@daterainc.com>, Jens Axboe <axboe@kernel.dk>
Subject: Re: [GIT PULL] direct IO support for loop driver
Message-ID: <20131121095837.GB18232@infradead.org>
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 <CA+55aFyF-Za7B=1kVDodbn942hETsWixAHCsh_wBA1b6pnUigQ@mail.gmail.com>
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On Wed, Nov 20, 2013 at 01:19:33PM -0800, Linus Torvalds wrote:
> I really don't see the point of all this crap. All this for the loop
> driver? If so, it had better at least be prettier than it is.

It's for anyone trying to to direct I/O from kernel space.  I have
patches that speed up ecryptfs and allow sane operation for the file
backed scsi target based on this that have been collecting dust for a
while.