在 2023/08/14 16:51, Xueshi Hu 写道:
Raid1 reshape will change mempool and r1conf::raid_disks which are
necessary when freeing r1bio. allow_barrier() make an concurrent
raid1_reshape() possible. So, free the in-flight r1bio firstly before
waiting blocked rdev.
Fixes: 6bfe0b499082 ("md: support blocking writes to an array on device failure")
LGTM
Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Xueshi Hu <xueshi.hu@xxxxxxxxxx>
---
drivers/md/raid1.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index dbbee0c14a5b..5f17f30a00a9 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1374,6 +1374,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
return;
}
+ retry_write:
r1_bio = alloc_r1bio(mddev, bio);
r1_bio->sectors = max_write_sectors;
@@ -1389,7 +1390,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
*/
disks = conf->raid_disks * 2;
- retry_write:
blocked_rdev = NULL;
rcu_read_lock();
max_sectors = r1_bio->sectors;
@@ -1469,7 +1469,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
for (j = 0; j < i; j++)
if (r1_bio->bios[j])
rdev_dec_pending(conf->mirrors[j].rdev, mddev);
- r1_bio->state = 0;
+ free_r1bio(r1_bio);
allow_barrier(conf, bio->bi_iter.bi_sector);
if (bio->bi_opf & REQ_NOWAIT) {
