Hi, Here''s the 2nd version of mixed back reference patches. Changes since previous version: - Add backward compatibility. - Pack back ref items in extent item. - Don''t increase data extents'' reference counts when tree log references them. - Remove the BTRFS_BLOCK_NO_OWNER_REF tree block flag, since it''s too difficult to keep the flag consistent. (The purperse of this flag was helping btrfsck checking the correctness of the back reference system) Thanks Yan, Zheng -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html