In btrfs_shrink_device, before btrfs_search_slot, path->reada is set to READA_FORWARD. But I think READA_BACK is correct. Since, 1.key.offset is set to (u64)-1 2.After btrfs_search_slot, btrfs_previous_item is called. So, for readahead previous items, READA_BACK is correct one. Signed-off-by: Gu Jinxiang <gujx@xxxxxxxxxxxxxx> --- fs/btrfs/volumes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 292266f6ab9c..1a3506a3003d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4473,7 +4473,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) if (!path) return -ENOMEM; - path->reada = READA_FORWARD; + path->reada = READA_BACK; mutex_lock(&fs_info->chunk_mutex); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
