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blk-mq: rework I/O completions

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Rework I/O completions to work more like the old code path.  blk_mq_end_io
now stays out of the business of deferring completions to others CPUs
and calling blk_mark_rq_complete.  The latter is very important to allow
completing requests that have timed out and thus are already marked completed,
the former allows using the IPI callout even for driver specific completions
instead of having to reimplement them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2014-02-10 03:24:38 -08:00
committed by Jens Axboe
parent c4540a7d8c
commit 30a91cb4ef
4 changed files with 37 additions and 24 deletions
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2
block/blk-timeout.c
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@@ -91,7 +91,7 @@ static void blk_rq_timed_out(struct request *req)
case BLK_EH_HANDLED:
/* Can we use req->errors here? */
if (q->mq_ops)
blk_mq_complete_request(req, req->errors);
__blk_mq_complete_request(req);
else
__blk_complete_request(req);
break;