On Wed, May 09, 2018 at 08:23:00AM -0600, Jens Axboe wrote:

Streams is essentially the only thing ki_hint is currently used for,
with the write life time hints mapping to a stream. The idea for the
user side API was to have other things than just write life time hints.

Since Adam wants to do priorities, he'd either need to pack into the
existing ki_hint, or do this patch does, which is make it smaller and
add a new member. I think the latter is cleaner.

Fair enough; but maybe we can use a u8 instead of a u16?  65,535
priorities still seem like way more than would ever make sense.  I
think 256 priorities is still way to many, but it's simpler while
still reserving number of bits for future se.

            		       	       	   - Ted

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