This patch series adds a performance improvement to user SDMA transfers from PSM applications by caching user buffer pages after pinning them. Subsequent uses of the same user buffer will not incur the cost of pinning the same pages again. Additionally, the cost of unpinning the same pages is avoided. Buffer pages are unpinned when the context is torn down or when the driver determines that the buffer should be evicted from the cache. Cache evictions happen when there is a request for a new, uncached buffer and the current size of the cache has reached a pre-defined limit. Series applies on "Adaptive PIO bug fixes..." series submitted yesterday and should apply cleanly to Doug's GitHub hfi1 branch. Can also be seen in my GitHub at: https://github.com/ddalessa/kernel/tree/for-4.6. --- Mitko Haralanov (16): IB/hfi1: Re-factor MMU notification code IB/hfi1: Allow MMU function execution in IRQ context IB/hfi1: Prevent NULL pointer dereference IB/hfi1: Allow remove MMU callbacks to free nodes IB/hfi1: Remove the use of add/remove RB function pointers IB/hfi1: Notify remove MMU/RB callback of calling context IB/hfi1: Use interval RB trees IB/hfi1: Add MMU tracing IB/hfi1: Remove compare callback IB/hfi1: Add filter callback IB/hfi1: Adjust last address values for intervals IB/hfi1: Implement SDMA-side buffer caching IB/hfi1: Add pin query function IB/hfi1: Specify mm when releasing pages IB/hfi1: Switch to using the pin query function IB/hfi1: Add SDMA cache eviction algorithm drivers/infiniband/hw/hfi1/Makefile | 2 drivers/infiniband/hw/hfi1/file_ops.c | 1 drivers/infiniband/hw/hfi1/hfi.h | 16 + drivers/infiniband/hw/hfi1/mmu_rb.c | 292 +++++++++++++++++++++++ drivers/infiniband/hw/hfi1/mmu_rb.h | 73 ++++++ drivers/infiniband/hw/hfi1/trace.c | 1 drivers/infiniband/hw/hfi1/trace.h | 1 drivers/infiniband/hw/hfi1/user_exp_rcv.c | 362 ++++++++--------------------- drivers/infiniband/hw/hfi1/user_pages.c | 63 ++++- drivers/infiniband/hw/hfi1/user_sdma.c | 319 +++++++++++++++++--------- drivers/infiniband/hw/hfi1/user_sdma.h | 4 11 files changed, 747 insertions(+), 387 deletions(-) create mode 100644 drivers/infiniband/hw/hfi1/mmu_rb.c create mode 100644 drivers/infiniband/hw/hfi1/mmu_rb.h -- -Denny -- 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
