blk-mq: allow non-softirq completions

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Right now we export two ways of completing a request:

1) blk_mq_complete_request(). This uses an IPI (if needed) and
   completes through q->softirq_done_fn(). It also works with
   timeouts.

2) blk_mq_end_io(). This completes inline, and ignores any timeout
   state of the request.

Let blk_mq_complete_request() handle non-softirq_done_fn completions
as well, by just completing inline. If a driver has enough completion
ports to place completions correctly, it need not define a
mq_ops->complete() and we can avoid an indirect function call by
doing the completion inline.

Signed-off-by: Jens Axboe <axboe@fb.com>

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This commit is contained in:

Jens Axboe 2014-05-27 17:46:48 -06:00

parent f14bbe77a9

commit 95f0968499

2 changed files with 13 additions and 3 deletions

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12

block/blk-mq.c

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4

include/linux/blk-mq.h

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