From: Yu Kuai <yukuai3@xxxxxxxxxx>
md_account_bio() is not called from raid10_handle_discard(), now that we
handle bitmap inside md_account_bio(), also fix missing
bitmap_startwrite for discard.
Test whole disk discard for 20G raid10:
Before:
Device d/s dMB/s drqm/s %drqm d_await dareq-sz
md0 48.00 16.00 0.00 0.00 5.42 341.33
After:
Device d/s dMB/s drqm/s %drqm d_await dareq-sz
md0 68.00 20462.00 0.00 0.00 2.65 308133.65
Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting")
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/raid10.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 9d8516acf2fd..6ef65b4d1093 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1735,6 +1735,7 @@ static int raid10_handle_discard(struct mddev *mddev, struct bio *bio)
* The discard bio returns only first r10bio finishes
*/
if (first_copy) {
+ md_account_bio(mddev, &bio);
r10_bio->master_bio = bio;
set_bit(R10BIO_Discard, &r10_bio->state);
first_copy = false;
--
2.39.2
