[PATCH v5 25/29] md/raid10: split reshape bios before bitmap accounting
From: Yu Kuai <yukuai@kernel.org>
Date: 2026-08-02 19:52:16
Also in:
lkml
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
From: Yu Kuai <yukuai@fygo.io> Use the shared mddev_bio_split_at_reshape_offset() helper so RAID10 submits only one-side bios to llbitmap during reshape. Tested-by: Mykola Marzhan <redacted> Signed-off-by: Yu Kuai <yukuai@fygo.io> --- drivers/md/raid10.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index bac9edd28c97..562a325a7195 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c@@ -1848,6 +1848,7 @@ static bool raid10_make_request(struct mddev *mddev, struct bio *bio) { struct r10conf *conf = mddev->private; sector_t chunk_mask = (conf->geo.chunk_mask & conf->prev.chunk_mask); + const int rw = bio_data_dir(bio); int chunk_sects = chunk_mask + 1; int sectors = bio_sectors(bio);
@@ -1873,6 +1874,15 @@ static bool raid10_make_request(struct mddev *mddev, struct bio *bio) sectors = chunk_sects - (bio->bi_iter.bi_sector & (chunk_sects - 1)); + + bio = mddev_bio_split_at_reshape_offset(mddev, bio, §ors, + &conf->bio_split); + if (!bio) { + if (rw == WRITE) + md_write_end(mddev); + return true; + } + if (!__make_request(mddev, bio, sectors)) md_write_end(mddev);
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2.51.0