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authorOmar Sandoval <osandov@fb.com>2018-05-09 02:08:53 -0700
committerJens Axboe <axboe@kernel.dk>2018-05-09 08:33:09 -0600
commit522a777566f5669606a1227bf13f3fb40963780b (patch)
tree7d37c9d591e5a9abb4fd1209f1c503ae1a0e8475 /block/blk.h
parent4bc6339a583cec650b05d6fdcc83f03f941c1a3b (diff)
downloadlinux-522a777566f5669606a1227bf13f3fb40963780b.tar.bz2
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.h')
-rw-r--r--block/blk.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk.h b/block/blk.h
index b034fd2460c4..eaf1a8e87d11 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -186,7 +186,7 @@ unsigned int blk_plug_queued_count(struct request_queue *q);
void blk_account_io_start(struct request *req, bool new_io);
void blk_account_io_completion(struct request *req, unsigned int bytes);
-void blk_account_io_done(struct request *req);
+void blk_account_io_done(struct request *req, u64 now);
/*
* EH timer and IO completion will both attempt to 'grab' the request, make