After mapping block with BTRFS_MAP_WRITE, parities have been sorted to
the end position, so this search can start from the first parity
stripe.
Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
v2: fix typo (data_stripes -> nr_data).
fs/btrfs/raid56.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 2086383..88a5b7b 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -2229,12 +2229,13 @@ raid56_parity_alloc_scrub_rbio(struct btrfs_fs_info
*fs_info, struct bio *bio,
ASSERT(!bio->bi_iter.bi_size);
rbio->operation = BTRFS_RBIO_PARITY_SCRUB;
- for (i = 0; i < rbio->real_stripes; i++) {
+ for (i = rbio->nr_data; i < rbio->real_stripes; i++) {
if (bbio->stripes[i].dev == scrub_dev) {
rbio->scrubp = i;
break;
}
}
+ ASSERT(i < rbio->real_stripes);
/* Now we just support the sectorsize equals to page size */
ASSERT(fs_info->sectorsize == PAGE_SIZE);
--
2.9.4
--
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