diff options
| author | Li Nan <linan122@huawei.com> | 2023-05-27 15:22:16 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-17 14:59:39 +0100 |
| commit | dd7a728d5c0d543faddcd6a94bdf0198c144d5a1 (patch) | |
| tree | 2311a33d43973980c9a1005e48fac07e59659c88 | |
| parent | 8ea0b8e32bed065df4c3e1b8a8dc49a5abb979cd (diff) | |
md/raid10: improve code of mrdev in raid10_sync_request
commit 59f8f0b54c8ffb4521f6bbd1cb6f4dfa5022e75e upstream.
'need_recover' and 'mrdev' are equivalent in raid10_sync_request(), and
inc mrdev->nr_pending is unreasonable if don't need recovery. Replace
'need_recover' with 'mrdev', and only inc nr_pending when needed.
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230527072218.2365857-3-linan666@huaweicloud.com
Cc: Hagar Gamal Halim <hagarhem@amazon.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/raid10.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 55144f7d9303..177cfc9f45d0 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3052,7 +3052,6 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, sector_t sect; int must_sync; int any_working; - int need_recover = 0; struct raid10_info *mirror = &conf->mirrors[i]; struct md_rdev *mrdev, *mreplace; @@ -3060,14 +3059,13 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, mrdev = rcu_dereference(mirror->rdev); mreplace = rcu_dereference(mirror->replacement); - if (mrdev != NULL && - !test_bit(Faulty, &mrdev->flags) && - !test_bit(In_sync, &mrdev->flags)) - need_recover = 1; + if (mrdev && (test_bit(Faulty, &mrdev->flags) || + test_bit(In_sync, &mrdev->flags))) + mrdev = NULL; if (mreplace && test_bit(Faulty, &mreplace->flags)) mreplace = NULL; - if (!need_recover && !mreplace) { + if (!mrdev && !mreplace) { rcu_read_unlock(); continue; } @@ -3101,7 +3099,8 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, rcu_read_unlock(); continue; } - atomic_inc(&mrdev->nr_pending); + if (mrdev) + atomic_inc(&mrdev->nr_pending); if (mreplace) atomic_inc(&mreplace->nr_pending); rcu_read_unlock(); @@ -3188,7 +3187,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, r10_bio->devs[1].devnum = i; r10_bio->devs[1].addr = to_addr; - if (need_recover) { + if (mrdev) { bio = r10_bio->devs[1].bio; bio->bi_next = biolist; biolist = bio; @@ -3233,7 +3232,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, for (k = 0; k < conf->copies; k++) if (r10_bio->devs[k].devnum == i) break; - if (!test_bit(In_sync, + if (mrdev && !test_bit(In_sync, &mrdev->flags) && !rdev_set_badblocks( mrdev, @@ -3259,12 +3258,14 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr, if (rb2) atomic_dec(&rb2->remaining); r10_bio = rb2; - rdev_dec_pending(mrdev, mddev); + if (mrdev) + rdev_dec_pending(mrdev, mddev); if (mreplace) rdev_dec_pending(mreplace, mddev); break; } - rdev_dec_pending(mrdev, mddev); + if (mrdev) + rdev_dec_pending(mrdev, mddev); if (mreplace) rdev_dec_pending(mreplace, mddev); if (r10_bio->devs[0].bio->bi_opf & MD_FAILFAST) { |