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| author | Hou Tao <houtao1@huawei.com> | 2019-05-21 15:59:03 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-09-15 16:02:08 -0600 |
| commit | 3d24430694077313c75c6b89f618db09943621e4 (patch) | |
| tree | f8688e775734e33e5616d916287e21f30147eb44 /block/blk-throttle.c | |
| parent | 89f3b6d62f2c7c1ed7b2e672be605016d9ff60f2 (diff) | |
| download | linux-stable-3d24430694077313c75c6b89f618db09943621e4.tar.gz linux-stable-3d24430694077313c75c6b89f618db09943621e4.tar.bz2 linux-stable-3d24430694077313c75c6b89f618db09943621e4.zip | |
block: make rq sector size accessible for block stats
Currently rq->data_len will be decreased by partial completion or
zeroed by completion, so when blk_stat_add() is invoked, data_len
will be zero and there will never be samples in poll_cb because
blk_mq_poll_stats_bkt() will return -1 if data_len is zero.
We could move blk_stat_add() back to __blk_mq_complete_request(),
but that would make the effort of trying to call ktime_get_ns()
once in vain. Instead we can reuse throtl_size field, and use
it for both block stats and block throttle, and adjust the
logic in blk_mq_poll_stats_bkt() accordingly.
Fixes: 4bc6339a583c ("block: move blk_stat_add() to __blk_mq_end_request()")
Tested-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-throttle.c')
| -rw-r--r-- | block/blk-throttle.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 0445c998c377..18f773e52dfb 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -2248,7 +2248,8 @@ void blk_throtl_stat_add(struct request *rq, u64 time_ns) struct request_queue *q = rq->q; struct throtl_data *td = q->td; - throtl_track_latency(td, rq->throtl_size, req_op(rq), time_ns >> 10); + throtl_track_latency(td, blk_rq_stats_sectors(rq), req_op(rq), + time_ns >> 10); } void blk_throtl_bio_endio(struct bio *bio) |