Hey, This patch replaces the ib_device_attr.max_sge with max_send_sge and max_recv_sge. It allows ulps to take advantage of devices that have very different send and recv sge depths. For example cxgb4 has a max_recv_sge of 4, yet a max_send_sge of 16. Splitting out these attributes allows more efficient use of the SQ for cxgb4 with ulps that use the RDMA_RW API. Consider a large RDMA WRITE that has 16 scattergather entries. With max_sge of 4, the ulp would send 4 WRITE WRs, but with max_sge of 16, it can be done with 1 WRITE WR. I've Cced all the driver and ulp maintainers since I changed their drivers. This is not ready to merge. It needs more review eyes, and more testing. Please comment! Thanks, Steve. Steve Wise (1): IB/core: add max_send_sge and max_recv_sge attributes drivers/infiniband/core/uverbs_cmd.c | 2 +- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 3 ++- drivers/infiniband/hw/cxgb3/iwch_provider.c | 3 ++- drivers/infiniband/hw/cxgb4/provider.c | 3 ++- drivers/infiniband/hw/hfi1/verbs.c | 3 ++- drivers/infiniband/hw/hns/hns_roce_main.c | 3 ++- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 3 ++- drivers/infiniband/hw/mlx4/main.c | 4 ++-- drivers/infiniband/hw/mlx5/main.c | 3 ++- drivers/infiniband/hw/mthca/mthca_provider.c | 5 +++-- drivers/infiniband/hw/nes/nes_verbs.c | 3 ++- drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 3 ++- drivers/infiniband/hw/qib/qib_verbs.c | 3 ++- drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 3 ++- drivers/infiniband/sw/rdmavt/qp.c | 5 +++-- drivers/infiniband/sw/rxe/rxe.c | 3 ++- drivers/infiniband/sw/rxe/rxe_qp.c | 8 ++++---- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 4 ++-- drivers/infiniband/ulp/ipoib/ipoib_verbs.c | 2 +- drivers/infiniband/ulp/isert/ib_isert.c | 5 +++-- drivers/infiniband/ulp/srpt/ib_srpt.c | 6 ++++-- drivers/nvme/host/rdma.c | 2 +- drivers/nvme/target/rdma.c | 4 ++-- fs/cifs/smbdirect.c | 13 ++++++++++--- include/rdma/ib_verbs.h | 3 ++- net/rds/ib.c | 2 +- net/sunrpc/xprtrdma/svc_rdma_transport.c | 3 ++- net/sunrpc/xprtrdma/verbs.c | 2 +- 28 files changed, 66 insertions(+), 40 deletions(-) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
