On Sat, Jun 12, 2021 at 04:17:30PM -0700, Linus Torvalds wrote:
> On Sat, Jun 12, 2021 at 2:47 PM Al Viro <[email protected]> wrote:
> >
> > O_DIRECT case is a PITA - there we use GUP and there's no way
> > to tell GUP that in the current situation we do *NOT* want to hit
> > ->fault()/->page_mkwrite()/etc. pagefault_disable() won't be even
> > noticed there...
>
> Well, we could change that.
>
> And we do have get_user_pages_fast_only() these days.
FWIW, I'm looking through the users of iov_iter_get_pages{,_alloc}()
right now; their semantics feels somewhat wrong. Will follow up
when I finish looking through that pile...
