tree f748a608e3489cc582a3788fe7dc776c5722ec97
parent 0c2a6fe4dc3e8c24bc67cd5d0a36092834027cf0
author Jens Axboe <axboe@fb.com> 1487356766 -0700
committer Jens Axboe <axboe@fb.com> 1487360147 -0700

blk-mq-sched: ask scheduler for work, if we failed dispatching leftovers

Usually we don't ask the scheduler for work, if we already have
leftovers on the dispatch list. This is done to leave work on
the scheduler side for as long as possible, for proper merging.
But if we do have work leftover but didn't dispatch anything,
then we should ask the scheduler since we could potentially
issue requests from that.

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>