search for: gup_fast_permit

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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...