Re: [PATCH 5/6] NFS: direct-io: convert to FOLL_PIN pages

[Al Viro]

On Sat, Aug 27, 2022 at 01:36:06AM -0700, John Hubbard wrote:
> Convert the NFS Direct IO layer to use pin_user_pages_fast() and
> unpin_user_page(), instead of get_user_pages_fast() and put_page().

Again, this stuff can be hit with ITER_BVEC iterators

> -		result = iov_iter_get_pages_alloc2(iter, &pagevec,
> +		result = dio_w_iov_iter_pin_pages_alloc(iter, &pagevec,
>  						  rsize, &pgbase);

and this will break on those.