As discussed at LPC'18, there is a need to be able to register a memory region (MR) on behalf of another process. One example is the case of post-copy container migration, in which CRIU is responsible for setting up the migration, but the contents of the memory are from the migrating process. In this case, we want all RDMA READ requests to be served by the address space of the migration process directly (not by CRIU). This patchset implements a new uverbs command which allows an application to register a memory region in the address space of another process. Joel Nider (5): mm: add get_user_pages_remote_longterm function RDMA/uverbs: add owner parameter to reg_user_mr RDMA/uverbs: add owner parameter to ib_umem_get RDMA/uverbs: add owner parameter to ib_umem_odp_get RDMA/uverbs: add UVERBS_METHOD_REG_REMOTE_MR drivers/infiniband/core/umem.c | 26 ++++-- drivers/infiniband/core/umem_odp.c | 50 +++++----- drivers/infiniband/core/uverbs_cmd.c | 2 +- drivers/infiniband/core/uverbs_std_types_mr.c | 129 +++++++++++++++++++++++++- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 11 ++- drivers/infiniband/hw/bnxt_re/ib_verbs.h | 1 + drivers/infiniband/hw/cxgb3/iwch_provider.c | 6 +- drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 1 + drivers/infiniband/hw/cxgb4/mem.c | 6 +- drivers/infiniband/hw/hns/hns_roce_cq.c | 2 +- drivers/infiniband/hw/hns/hns_roce_db.c | 2 +- drivers/infiniband/hw/hns/hns_roce_mr.c | 4 +- drivers/infiniband/hw/hns/hns_roce_qp.c | 2 +- drivers/infiniband/hw/hns/hns_roce_srq.c | 2 +- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 3 +- drivers/infiniband/hw/mlx4/cq.c | 2 +- drivers/infiniband/hw/mlx4/doorbell.c | 2 +- drivers/infiniband/hw/mlx4/mlx4_ib.h | 1 + drivers/infiniband/hw/mlx4/mr.c | 3 +- drivers/infiniband/hw/mlx4/qp.c | 2 +- drivers/infiniband/hw/mlx4/srq.c | 2 +- drivers/infiniband/hw/mlx5/cq.c | 4 +- drivers/infiniband/hw/mlx5/devx.c | 2 +- drivers/infiniband/hw/mlx5/doorbell.c | 2 +- drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 +- drivers/infiniband/hw/mlx5/mr.c | 17 ++-- drivers/infiniband/hw/mlx5/odp.c | 11 ++- drivers/infiniband/hw/mlx5/qp.c | 4 +- drivers/infiniband/hw/mlx5/srq.c | 2 +- drivers/infiniband/hw/mthca/mthca_provider.c | 5 +- drivers/infiniband/hw/nes/nes_verbs.c | 5 +- drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 6 +- drivers/infiniband/hw/ocrdma/ocrdma_verbs.h | 3 +- drivers/infiniband/hw/qedr/verbs.c | 8 +- drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 1 + drivers/infiniband/hw/usnic/usnic_ib_verbs.h | 1 + drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c | 2 +- drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c | 2 +- drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c | 5 +- drivers/infiniband/hw/vmw_pvrdma/pvrdma_srq.c | 2 +- drivers/infiniband/sw/rdmavt/mr.c | 3 +- drivers/infiniband/sw/rdmavt/mr.h | 1 + drivers/infiniband/sw/rxe/rxe_mr.c | 3 +- drivers/infiniband/sw/rxe/rxe_verbs.c | 4 +- include/linux/mm.h | 28 +++++- include/rdma/ib_umem.h | 3 +- include/rdma/ib_umem_odp.h | 6 +- include/rdma/ib_verbs.h | 9 ++ include/uapi/rdma/ib_user_ioctl_cmds.h | 13 +++ mm/gup.c | 15 ++- 50 files changed, 327 insertions(+), 103 deletions(-) -- 2.7.4
