[PATCH v3 12/21] md/md-llbitmap: don't skip reshape ranges from bitmap state
From: Yu Kuai <yukuai@kernel.org>
Date: 2026-07-28 08:50:26
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lkml
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
From: Yu Kuai <yukuai@fygo.io> Reshape progress is tracked by array metadata rather than llbitmap. Do not let llbitmap skip_sync_blocks() suppress reshape ranges based on stale bitmap state before the corresponding checkpoint is persisted. Signed-off-by: Yu Kuai <yukuai@fygo.io> --- drivers/md/md-llbitmap.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/md/md-llbitmap.c b/drivers/md/md-llbitmap.c
index 929c1f40ddec..bdc6ec8972f0 100644
--- a/drivers/md/md-llbitmap.c
+++ b/drivers/md/md-llbitmap.c@@ -1687,6 +1687,14 @@ static sector_t llbitmap_skip_sync_blocks(struct mddev *mddev, sector_t offset) return 0; c = llbitmap_read(llbitmap, p); + /* + * Reshape progress is tracked by array metadata rather than llbitmap. + * Skipping reshape ranges from stale bitmap state can lose data after a + * restart before the corresponding bits are checkpointed to disk. + */ + if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) + return 0; + /* always skip unwritten blocks */ if (c == BitUnwritten) return blocks;
--
2.51.0