On Fri, Dec 03, 2021 at 08:38:29AM -0700, Jens Axboe wrote: > Don't call into generic_file_read_iter() if we know it's O_DIRECT, just > set it up ourselves and call our own handler. This avoids an indirect call > for O_DIRECT. > > Fall back to filemap_read() if we fail. Please also do it for the write side, having a partial ->direct_IO is a really bad idea.
