From: Li Nan <linan122@xxxxxxxxxx>
If iostats is disabled, disk_stats will not be updated and
part_stat_read_accum() only returns a constant value. In this case,
continuing to count sync_io and to check is_mddev_idle() is no longer
meaningful.
Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
---
drivers/md/md.h | 3 ++-
drivers/md/md.c | 4 ++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 1a4f976951c1..75f5c5d04e71 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -589,7 +589,8 @@ static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sect
static inline void md_sync_acct_bio(struct bio *bio, unsigned long nr_sectors)
{
- md_sync_acct(bio->bi_bdev, nr_sectors);
+ if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
+ md_sync_acct(bio->bi_bdev, nr_sectors);
}
struct md_personality
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1d71b2a9af03..18bbceb0ffd6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8502,6 +8502,10 @@ 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_disk;
+
+ if (blk_queue_io_stat(mddev->queue))
+ continue;
+
curr_events =
(long long)part_stat_read_accum(disk->part0, sectors) -
atomic64_read(&disk->sync_io);
--
2.39.2
