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md/raid1: switch to use md_account_bio() for io accounting

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Two problems can be fixed this way:

1) 'active_io' will represent inflight io instead of io that is
dispatching.

2) If io accounting is enabled or disabled while io is still inflight,
bio_start_io_acct() and bio_end_io_acct() is not balanced and io
inflight counter will be leaked.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230621165110.1498313-5-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai 2023-06-22 00:51:06 +08:00 committed by Song Liu
parent 05048cbcca
commit bb2a9acefa
2 changed files with 6 additions and 9 deletions
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14
drivers/md/raid1.c
View file

@ -304,8 +304,6 @@ static void call_bio_endio(struct r1bio *r1_bio)
if (!test_bit(R1BIO_Uptodate, &r1_bio->state))
bio->bi_status = BLK_STS_IOERR;
if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
bio_end_io_acct(bio, r1_bio->start_time);
bio_endio(bio);
}
@ -1303,10 +1301,10 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
}
r1_bio->read_disk = rdisk;
if (!r1bio_existed && blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
r1_bio->start_time = bio_start_io_acct(bio);
if (!r1bio_existed) {
md_account_bio(mddev, &bio);
r1_bio->master_bio = bio;
}
read_bio = bio_alloc_clone(mirror->rdev->bdev, bio, gfp,
&mddev->bio_set);
@ -1500,8 +1498,8 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
r1_bio->sectors = max_sectors;
}
if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
r1_bio->start_time = bio_start_io_acct(bio);
md_account_bio(mddev, &bio);
r1_bio->master_bio = bio;
atomic_set(&r1_bio->remaining, 1);
atomic_set(&r1_bio->behind_remaining, 0);

1
drivers/md/raid1.h
View file

@ -157,7 +157,6 @@ struct r1bio {
sector_t sector;
int sectors;
unsigned long state;
unsigned long start_time;
struct mddev *mddev;
/*
* original bio going to /dev/mdx