Re: [RESEND 4/7] mm/gup: Add FOLL_LONGTERM capability to GUP fast

Dan Williams
2019-03-25T22:36:28Z

On Mon, Mar 25, 2019 at 3:22 PM Ira Weiny <ira.weiny@intel.com> wrote:
[..]
> FWIW this thread is making me think my original patch which simply implemented
> get_user_pages_fast_longterm() would be more clear. There is some evidence
> that the GUP API was trending that way (see get_user_pages_remote). That seems
> wrong but I don't know how to ensure users don't specify the wrong flag.

What about just making the existing get_user_pages_longterm() have a
fast path option?