diff options
| author | Michael Callahan <michaelcallahan@fb.com> | 2018-07-18 04:47:37 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-18 08:44:16 -0600 |
| commit | 59767fbd49d794b4499d30b314df6c0d4aca584b (patch) | |
| tree | c9c02d6336a9408343a08065a032745740e898b2 /drivers/md/md.c | |
| parent | 3f289dcb4b265416a57ca79cf4a324060bb09060 (diff) | |
| download | lwn-59767fbd49d794b4499d30b314df6c0d4aca584b.tar.gz lwn-59767fbd49d794b4499d30b314df6c0d4aca584b.zip | |
block: Add part_stat_read_accum to read across field entries.
Add a part_stat_read_accum macro to genhd.h to read and sum across
field entries. For example to sum up the number read and write
sectors completed. In addition to being ar reasonable cleanup by
itself this will make it easier to add new stat fields in the future.
tj: Refreshed on top of v4.17.
Signed-off-by: Michael Callahan <michaelcallahan@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 994aed2f9dff..dabe36723d60 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8046,8 +8046,7 @@ static int is_mddev_idle(struct mddev *mddev, int init) rcu_read_lock(); rdev_for_each_rcu(rdev, mddev) { struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; - curr_events = (int)part_stat_read(&disk->part0, sectors[0]) + - (int)part_stat_read(&disk->part0, sectors[1]) - + curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - atomic_read(&disk->sync_io); /* sync IO will cause sync_io to increase before the disk_stats * as sync_io is counted when a request starts, and |