On Wed, Nov 16, 2022 at 11:26:50AM +0100, David Hildenbrand wrote: > 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. > > Cc: Christian Benvenuti <be...@cisco.com> > Cc: Nelson Escobar <neesc...@cisco.com> > Cc: Jason Gunthorpe <j...@ziepe.ca> > Cc: Leon Romanovsky <l...@kernel.org> > Signed-off-by: David Hildenbrand <da...@redhat.com> > --- > drivers/infiniband/hw/usnic/usnic_uiom.c | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-)
Reviewed-by: Jason Gunthorpe <j...@nvidia.com> Jason _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um
