Use case for "loop: Issue O_DIRECT aio with pages"?

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> >My latest focus is on completing the work started on by Zach Brown to
> >add a kernel interface to allow kernel code to submit aio, and having
> >the loop device submit direct IO requests to the underlying file system.

So I've been taking a lot at your patch series, and one of the things
which would help me understand the requirements behind what you are
doing is *why* is it interesting to allow kernel code to submit aio
requests, and loop devices to be able to direct I/O requests all the
way to the underlying file systems.  In other words, what's the use
case that you're most interested in that these patches would enable?

Thanks, regards,

						- Ted
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