Hi Jason, hi Doug, hi Jens Please consider to include following changes to the next merge window. This enables fast memory registration for write IO patch, so rtrs can support bigger IO than 116k without splitting. With this in place, both read/write request are more symmetric, and we can also reduce the memory usage. The patchset is orgnized as: - patch1 preparation. - patch2 implement fast memory registration for write patch. - patch3 reduce memory usage. - patch4 raise MAX_SGEMENTs - patch5 rnbd-clt to query and use the max_sgements setting. As the main change is in RTRS, so it's easier to go through RDMA tree, hence send this patchset to linux-rdma. This patchset depends on: https://lore.kernel.org/linux-rdma/20210608103039.39080-1-jinpu.wang@xxxxxxxxx/T/#t Jack Wang (5): RDMA/rtrs: Introduce head/tail wr RDMA/rtrs-clt: Write path fast memory registration RDMA/rtrs_clt: Alloc less memory with write path fast memory registration RDMA/rtrs-clt: Raise MAX_SEGMENTS rnbd/rtrs-clt: Query and use max_segments from rtrs-clt. drivers/block/rnbd/rnbd-clt.c | 5 +- drivers/block/rnbd/rnbd-clt.h | 5 +- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 143 ++++++++++++++++--------- drivers/infiniband/ulp/rtrs/rtrs-clt.h | 1 + drivers/infiniband/ulp/rtrs/rtrs-pri.h | 3 +- drivers/infiniband/ulp/rtrs/rtrs.c | 28 ++--- drivers/infiniband/ulp/rtrs/rtrs.h | 2 +- 7 files changed, 119 insertions(+), 68 deletions(-) -- 2.25.1
