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authorOmar Sandoval <osandov@fb.com>2018-05-09 02:08:50 -0700
committerJens Axboe <axboe@kernel.dk>2018-05-09 08:33:05 -0600
commit544ccc8dc904db55d4576c27a1eb66a888ffacea (patch)
tree5fa92e3cf1a5d33eddc61dfd65d088dd5cdb6f84 /block/blk-wbt.h
parent5238dcf4136fd7287be8e7d38752645bfa5782ec (diff)
downloadlinux-0-day-544ccc8dc904db55d4576c27a1eb66a888ffacea.tar.gz
block: get rid of struct blk_issue_stat
struct blk_issue_stat squashes three things into one u64: - The time the driver started working on a request - The original size of the request (for the io.low controller) - Flags for writeback throttling It turns out that on x86_64, we have a 4 byte hole in struct request which we can fill with the non-timestamp fields from blk_issue_stat, simplifying things quite a bit. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-wbt.h')
-rw-r--r--block/blk-wbt.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/blk-wbt.h b/block/blk-wbt.h
index 85fbccc..300df53 100644
--- a/block/blk-wbt.h
+++ b/block/blk-wbt.h
@@ -63,7 +63,7 @@ struct rq_wb {
struct blk_stat_callback *cb;
- s64 sync_issue;
+ u64 sync_issue;
void *sync_cookie;
unsigned int wc;
@@ -90,7 +90,7 @@ static inline unsigned int wbt_inflight(struct rq_wb *rwb)
static inline void wbt_track(struct request *rq, enum wbt_flags flags)
{
- rq->issue_stat.stat |= ((u64)flags) << BLK_STAT_RES_SHIFT;
+ rq->wbt_flags |= flags;
}
void __wbt_done(struct rq_wb *, enum wbt_flags);