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| author | Omar Sandoval <osandov@fb.com> | 2018-05-09 12:08:53 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-09 17:33:09 +0300 |
| commit | 522a777566f5669606a1227bf13f3fb40963780b (patch) | |
| tree | 7d37c9d591e5a9abb4fd1209f1c503ae1a0e8475 /block/blk-stat.h | |
| parent | 4bc6339a583cec650b05d6fdcc83f03f941c1a3b (diff) | |
| download | linux-522a777566f5669606a1227bf13f3fb40963780b.tar.xz | |
block: consolidate struct request timestamp fields
Currently, struct request has four timestamp fields:
- A start time, set at get_request time, in jiffies, used for iostats
- An I/O start time, set at start_request time, in ktime nanoseconds,
used for blk-stats (i.e., wbt, kyber, hybrid polling)
- Another start time and another I/O start time, used for cfq and bfq
These can all be consolidated into one start time and one I/O start
time, both in ktime nanoseconds, shaving off up to 16 bytes from struct
request depending on the kernel config.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-stat.h')
| -rw-r--r-- | block/blk-stat.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-stat.h b/block/blk-stat.h index 17c812db0aca..78399cdde9c9 100644 --- a/block/blk-stat.h +++ b/block/blk-stat.h @@ -65,7 +65,7 @@ struct blk_stat_callback { struct blk_queue_stats *blk_alloc_queue_stats(void); void blk_free_queue_stats(struct blk_queue_stats *); -void blk_stat_add(struct request *); +void blk_stat_add(struct request *rq, u64 now); /* record time/size info in request but not add a callback */ void blk_stat_enable_accounting(struct request_queue *q); |