Re: [PATCH v2 01/17] mm/gup: Fixup p*_access_permitted()

[Linus Torvalds]

On Fri, Dec 15, 2017 at 6:52 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> However, since the main use case of protection keys is probably
> databases (Dave?) and since those also might be performance-sensitive
> about direct-IO doing page table lookups, it might not be great in
> practice.

Anyway, I reverted the three commits Dan pointed to, and we can always
revisit the exact path forward later

Because regardless of what the eventual future checks will be, for
4.15 I think we'll just go back to doing what we used to do.

If somebody sees problems, holler.

                  Linus