On Sun, Nov 10, 2024 at 08:28:07AM -0700, Jens Axboe wrote: > Read side was already fully supported, for the write side all that's > needed now is calling generic_uncached_write() when uncached writes > have been submitted. With that, enable the use of RWF_UNCACHED with XFS > by flagging support with FOP_UNCACHED. It also might make sense to default to RWF_UNCACHED for the direct to buffered I/O fallback for sub-block size writes to reflink files. Also for the next round you probably want to add the xfs and ext4 lists.
