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| author |  Mike Snitzer <snitzer@kernel.org>
| 2022-03-26 14:38:07 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org>
| 2022-05-05 17:31:34 -0400 |
| commit | 982b48ae25d9aabd69c1f012a94f63766181f0b2 (patch) | |
| tree | f86a32b990532360172b26d5c08ddb2c96384e75 /drivers/md/dm-core.h | |
| parent | dm: add local variables to clone_endio and __map_bio (diff) | |
| download | linux-982b48ae25d9aabd69c1f012a94f63766181f0b2.tar.gz linux-982b48ae25d9aabd69c1f012a94f63766181f0b2.tar.bz2 linux-982b48ae25d9aabd69c1f012a94f63766181f0b2.zip | |
dm: move hot dm_io members to same cacheline as dm_target_io
Just saves some cacheline bouncing for members accessed during cloned
bio submission and completion.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-core.h')
| -rw-r--r-- | drivers/md/dm-core.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index db069fa9cee5..41d6511dc7cf 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -250,17 +250,19 @@ static inline bool dm_tio_is_normal(struct dm_target_io *tio) #define DM_IO_MAGIC 19577 struct dm_io { unsigned short magic; - blk_short_t flags; - atomic_t io_count; - struct mapped_device *md; - struct bio *orig_bio; - blk_status_t status; + spinlock_t lock; unsigned long start_time; void *data; struct hlist_node node; struct task_struct *map_task; struct dm_stats_aux stats_aux; + + blk_short_t flags; + blk_status_t status; + atomic_t io_count; + struct mapped_device *md; + struct bio *orig_bio; /* last member of dm_target_io is 'struct bio' */ struct dm_target_io tio; }; |