On Tue, Oct 15, 2019 at 4:48 AM Meelis Roos <mroos@xxxxxxxx> wrote:
> 19.08.19 08:58 Linus Torvalds wrote:
> >
> > It does sound like we should just disable HAVE_FAST_GUP for sparc. And
> > yes, it's "only" an optimization, disabling it shouldn't bvreak
> > anything. get_user_pages_fast() will fall back on the regular
> > get_user_pages() logic if there is not fast-GUP.
>
> So yes, will we do this to get rid of that regression?
Ok, I'll just remove that HAVE_FAST_GUP - I was expecting it to come
through David, but I was also really hoping we'd have a guess as to
why it happens on some hardware and configurations but not others.
Weird.
Linus
