diff options
| author | Yu Kuai <yukuai3@huawei.com> | 2024-02-29 12:57:09 +0300 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2024-03-01 09:49:46 +0300 |
| commit | f109207629552cb04c2a48e90abe7c481e363984 (patch) | |
| tree | e3978d7544ef8aa1c42428465d118988131af3ba /drivers/md/raid10.c | |
| parent | f29841ff3b272e1703454f93b96baf0fe0d9f31a (diff) | |
| download | linux-f109207629552cb04c2a48e90abe7c481e363984.tar.xz | |
md/raid1-10: factor out a new helper raid1_should_read_first()
If resync is in progress, read_balance() should find the first usable
disk, otherwise, data could be inconsistent after resync is done. raid1
and raid10 implement the same checking, hence factor out the checking
to make code cleaner.
Noted that raid1 is using 'mddev->recovery_cp', which is updated after
all resync IO is done, while raid10 is using 'conf->next_resync', which
is inaccurate because raid10 update it before submitting resync IO.
Fortunately, raid10 read IO can't concurrent with resync IO, hence there
is no problem. And this patch also switch raid10 to use
'mddev->recovery_cp'.
Co-developed-by: Paul Luse <paul.e.luse@linux.intel.com>
Signed-off-by: Paul Luse <paul.e.luse@linux.intel.com>
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/20240229095714.926789-7-yukuai1@huaweicloud.com
Diffstat (limited to 'drivers/md/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index d5a7a621f0f0..8aecdb1ccc16 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -748,17 +748,8 @@ static struct md_rdev *read_balance(struct r10conf *conf, best_good_sectors = 0; do_balance = 1; clear_bit(R10BIO_FailFast, &r10_bio->state); - /* - * Check if we can balance. We can balance on the whole - * device if no resync is going on (recovery is ok), or below - * the resync window. We take the first readable disk when - * above the resync window. - */ - if ((conf->mddev->recovery_cp < MaxSector - && (this_sector + sectors >= conf->next_resync)) || - (mddev_is_clustered(conf->mddev) && - md_cluster_ops->area_resyncing(conf->mddev, READ, this_sector, - this_sector + sectors))) + + if (raid1_should_read_first(conf->mddev, this_sector, sectors)) do_balance = 0; for (slot = 0; slot < conf->copies ; slot++) { |