Jan Kara <jack@xxxxxxx> wrote: > ... So filesystems really need DIO reads to use FOLL_PIN instead of FOLL_GET > and consequently we need to pass information to bio completion function how > page references should be dropped. That information would be available in the bio struct with this patch if necessary, though transcribed into a combination of BIO_* flags instead off FOLL_* flags. I wonder if there's the possibility of the filesystem that generated the bio nicking the pages out of the bio and putting them itself. David
