On 2019/7/18 20:31, Christoph Hellwig wrote: > That being said until the tail packing fs (erofs?) actually uses > buffer_heads we should not need this hunk, and I don't think erofs > should have any reason to use buffer_heads. Yes, erofs will not use buffer_head to support sub-page blocksize in the long term. too heavy and no need... Thanks, Gao Xiang