Displaying 1 result from an estimated 1 matches for "gup_fast_permit".
2019 Feb 20
0
[RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it
...his series. I was anticipating these going through the mm tree as they
> depend on a cleanup patch there and the IB changes are very minor. But they
> could just as well go through the IB tree.
>
> NOTE: This series depends on my clean up patch to remove the write parameter
> from gup_fast_permitted()[1]
>
> HFI1, qib, and mthca, use get_user_pages_fast() due to it performance
> advantages. These pages can be held for a significant time. But
> get_user_pages_fast() does not protect against mapping of FS DAX pages.
This I don't get - if you do lock down long term mappings...