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| author |   Christoph Hellwig <hch@lst.de> | 2020-06-03 07:14:43 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-06-04 21:16:11 -0600 |
| commit | d24de76af836260a99ca2ba281a937bd5bc55591 (patch) | |
| tree | 3e0982ad803e59fa210695684cfd58820cf9f86d | |
| parent | loop: Fix wrong masking of status flags (diff) | |
| download | wireguard-linux-d24de76af836260a99ca2ba281a937bd5bc55591.tar.xz wireguard-linux-d24de76af836260a99ca2ba281a937bd5bc55591.zip | |
block: remove the error argument to the block_bio_complete tracepoint
The status can be trivially derived from the bio itself. That also avoid
callers like NVMe to incorrectly pass a blk_status_t instead of the errno,
and the overhead of translating the blk_status_t to the errno in the I/O
completion fast path when no tracing is enabled.
Fixes: 35fe0d12c8a3 ("nvme: trace bio completion")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bio.c | 3 | ||||
| -rw-r--r-- | drivers/nvme/host/nvme.h | 3 | ||||
| -rw-r--r-- | include/trace/events/block.h | 6 | ||||
| -rw-r--r-- | kernel/trace/blktrace.c | 6 |
4 files changed, 8 insertions, 10 deletions
diff --git a/block/bio.c b/block/bio.c index 5235da6434aa..a7366c02c9b5 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1434,8 +1434,7 @@ again: } if (bio->bi_disk && bio_flagged(bio, BIO_TRACE_COMPLETION)) { - trace_block_bio_complete(bio->bi_disk->queue, bio, - blk_status_to_errno(bio->bi_status)); + trace_block_bio_complete(bio->bi_disk->queue, bio); bio_clear_flag(bio, BIO_TRACE_COMPLETION); } diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index fa5c75501049..c0f4226d3299 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -599,8 +599,7 @@ static inline void nvme_trace_bio_complete(struct request *req, struct nvme_ns *ns = req->q->queuedata; if (req->cmd_flags & REQ_NVME_MPATH) - trace_block_bio_complete(ns->head->disk->queue, - req->bio, status); + trace_block_bio_complete(ns->head->disk->queue, req->bio); } extern struct device_attribute dev_attr_ana_grpid; diff --git a/include/trace/events/block.h b/include/trace/events/block.h index 81b43f5bdf23..1257f26bb887 100644 --- a/include/trace/events/block.h +++ b/include/trace/events/block.h @@ -261,9 +261,9 @@ TRACE_EVENT(block_bio_bounce, */ TRACE_EVENT(block_bio_complete, - TP_PROTO(struct request_queue *q, struct bio *bio, int error), + TP_PROTO(struct request_queue *q, struct bio *bio), - TP_ARGS(q, bio, error), + TP_ARGS(q, bio), TP_STRUCT__entry( __field( dev_t, dev ) @@ -277,7 +277,7 @@ TRACE_EVENT(block_bio_complete, __entry->dev = bio_dev(bio); __entry->sector = bio->bi_iter.bi_sector; __entry->nr_sector = bio_sectors(bio); - __entry->error = error; + __entry->error = blk_status_to_errno(bio->bi_status); blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); ), diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index ea47f2084087..1e5499414cdf 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -885,10 +885,10 @@ static void blk_add_trace_bio_bounce(void *ignore, } static void blk_add_trace_bio_complete(void *ignore, - struct request_queue *q, struct bio *bio, - int error) + struct request_queue *q, struct bio *bio) { - blk_add_trace_bio(q, bio, BLK_TA_COMPLETE, error); + blk_add_trace_bio(q, bio, BLK_TA_COMPLETE, + blk_status_to_errno(bio->bi_status)); } static void blk_add_trace_bio_backmerge(void *ignore, |