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authorOmar Sandoval <osandov@fb.com>2018-05-09 12:08:53 +0300
committerJens Axboe <axboe@kernel.dk>2018-05-09 17:33:09 +0300
commit522a777566f5669606a1227bf13f3fb40963780b (patch)
tree7d37c9d591e5a9abb4fd1209f1c503ae1a0e8475 /block/blk-stat.h
parent4bc6339a583cec650b05d6fdcc83f03f941c1a3b (diff)
downloadlinux-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.h2
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);