On Mon, Jan 18, 2021 at 08:35:15PM +0100, Christoph Hellwig wrote: > Add a flag to signal an I/O that is not file system block aligned. > + if (dio_flags & IOMAP_DIO_UNALIGNED) { There are a number of things that DIO has to be aligned to -- memory addresses, for example. Can we be a little more verbose about what is unaligned here? eg if (dio_flags & IOMAP_DIO_FS_UNALIGNED) (or FSBLK_UNALIGNED, or ... something).