Hi folks, This is the latest version of the "use FUA for DIO writes" patchset that was last posted here: https://marc.info/?l=linux-xfs&m=152213446528167&w=2 Functionality and performance is the same as the previous version. Changes in this version address Christoph's review comments. Version 2: - Fixed comment typos in first patch - simplified iomap_dio_complete_work() - changed IOMAP_DIO_WRITE_SYNC to IOMAP_DIO_NEED_SYNC - split blk_queue_fua() into it's own patch - fixed formatting issue in last patch - update bio->io_opf directly rather than use bio_set_op_attrs() - Updated comment to mention we try to use FUA optimistically. Cheers, Dave.