[PATCH 0/2] mm/gup + IB: allow FOLL_FORCE for gup_fast and use in IB

[John Hubbard]

Hi Leon, Jason, Christoph,

Maybe I'm overlooking something, but as I wrote in patch 1, it looks
like we can simply allow FOLL_FORCE to be passed to gup_fast().

This should fix Leon's reported RDMA failure [1]  when using patch 2 by
itself. (I've compile- and boot-tested these, and also did short LTP
and fio with direct IO tests, but I don't have an Infiniband runtime
setup that exercises the umem.c code.)

[1] 20191124100724.GH136476@unreal">https://lore.kernel.org/r/20191124100724.GH136476@unreal

John Hubbard (2):
  mm/gup: allow FOLL_FORCE for get_user_pages_fast()
  IB/umem: use get_user_pages_fast() to pin DMA pages

 drivers/infiniband/core/umem.c | 17 ++++++-----------
 mm/gup.c                       |  3 ++-
 2 files changed, 8 insertions(+), 12 deletions(-)

-- 
2.24.0