On Mon, Jan 23, 2023 at 06:42:28PM -0800, John Hubbard wrote: > > @@ -202,7 +202,7 @@ static void iomap_dio_zero(const struct iomap_iter *iter, struct iomap_dio *dio, > > bio->bi_private = dio; > > bio->bi_end_io = iomap_dio_bio_end_io; > > - get_page(page); > > + bio_set_flag(bio, BIO_NO_PAGE_REF); > > ...is it accurate to assume that the entire bio is pointing to the zero > page? I recall working through this area earlier last year, and ended up > just letting the zero page get pinned, and then unpinning upon release, > which is harmless. Yes, the bio is built 4 lines above what is quoted here, and submitted right after it. It only contains the ZERO_PAGE.
