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Message-Id: <20230619204826.755559-4-yukuai1@huaweicloud.com>
Date: Tue, 20 Jun 2023 04:48:21 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: xni@...hat.com, song@...nel.org
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
yangerkun@...wei.com
Subject: [PATCH -next 3/8] raid5: fix missing io accounting in raid5_align_endio()
From: Yu Kuai <yukuai3@...wei.com>
Io will only be accounted as done from raid5_align_endio() if the io
succeed, and io inflight counter will be leaked if such io failed.
Fix this problem by switching to use md_account_bio() for io accounting.
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
drivers/md/raid5.c | 29 ++++++++---------------------
1 file changed, 8 insertions(+), 21 deletions(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index cef0b400b2ee..4cdb35e54251 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5468,26 +5468,17 @@ static struct bio *remove_bio_from_retry(struct r5conf *conf,
*/
static void raid5_align_endio(struct bio *bi)
{
- struct md_io_clone *md_io_clone = bi->bi_private;
- struct bio *raid_bi = md_io_clone->orig_bio;
- struct mddev *mddev;
- struct r5conf *conf;
- struct md_rdev *rdev;
+ struct bio *raid_bi = bi->bi_private;
+ struct md_rdev *rdev = (void *)raid_bi->bi_next;
+ struct mddev *mddev = rdev->mddev;
+ struct r5conf *conf = mddev->private;
blk_status_t error = bi->bi_status;
- unsigned long start_time = md_io_clone->start_time;
bio_put(bi);
-
- rdev = (void*)raid_bi->bi_next;
raid_bi->bi_next = NULL;
- mddev = rdev->mddev;
- conf = mddev->private;
-
rdev_dec_pending(rdev, conf->mddev);
if (!error) {
- if (blk_queue_io_stat(raid_bi->bi_bdev->bd_disk->queue))
- bio_end_io_acct(raid_bi, start_time);
bio_endio(raid_bi);
if (atomic_dec_and_test(&conf->active_aligned_reads))
wake_up(&conf->wait_for_quiescent);
@@ -5506,7 +5497,6 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
struct md_rdev *rdev;
sector_t sector, end_sector, first_bad;
int bad_sectors, dd_idx;
- struct md_io_clone *md_io_clone;
bool did_inc;
if (!in_chunk_boundary(mddev, raid_bio)) {
@@ -5543,16 +5533,13 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
return 0;
}
- align_bio = bio_alloc_clone(rdev->bdev, raid_bio, GFP_NOIO,
- &mddev->io_clone_set);
- md_io_clone = container_of(align_bio, struct md_io_clone, bio_clone);
+ md_account_bio(mddev, &raid_bio);
raid_bio->bi_next = (void *)rdev;
- if (blk_queue_io_stat(raid_bio->bi_bdev->bd_disk->queue))
- md_io_clone->start_time = bio_start_io_acct(raid_bio);
- md_io_clone->orig_bio = raid_bio;
+ align_bio = bio_alloc_clone(rdev->bdev, raid_bio, GFP_NOIO,
+ &mddev->bio_set);
align_bio->bi_end_io = raid5_align_endio;
- align_bio->bi_private = md_io_clone;
+ align_bio->bi_private = raid_bio;
align_bio->bi_iter.bi_sector = sector;
/* No reshape active, so we can trust rdev->data_offset */
--
2.39.2
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