diff options
| author | David Hildenbrand <david@redhat.com> | 2022-11-16 11:26:49 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-30 15:58:58 -0800 |
| commit | b40656aa7d559adc1fe689396dc58b92a9a27286 (patch) | |
| tree | fb4a86378ab328b46e4c37093942378fa8631e31 /scripts/gdb/linux/proc.py | |
| parent | 84209e87c6963f928194a890399e24e8ad299db1 (diff) | |
RDMA/umem: remove FOLL_FORCE usage
GUP now supports reliable R/O long-term pinning in COW mappings, such
that we break COW early. MAP_SHARED VMAs only use the shared zeropage so
far in one corner case (DAXFS file with holes), which can be ignored
because GUP does not support long-term pinning in fsdax (see
check_vma_flags()).
Consequently, FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM is no longer required
for reliable R/O long-term pinning: FOLL_LONGTERM is sufficient. So stop
using FOLL_FORCE, which is really only for ptrace access.
Link: https://lkml.kernel.org/r/20221116102659.70287-11-david@redhat.com
Tested-by: Leon Romanovsky <leonro@nvidia.com> [over mlx4 and mlx5]
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/gdb/linux/proc.py')
0 files changed, 0 insertions, 0 deletions