[PATCH rdma-next v1 0/6] Expose CQ moderation to user space

Leon Romanovsky
2017-10-29T13:51:34Z

Changelog v0-v1:
* Dropped comp_mask, there is already attr_mask
* Put CQ moderartion into special struct instead of general struct ib_uverbs_ex_modify_cq

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This patch set exposes CQ moderation. This will allow to moderate
number of CQEs needed to create an event. Such change brings performance
improvement by reducing pressure on application to receive event per-CQE.

The proposed semantics follows the well-established kernel semantics.

* cq_max_count - defines the number of cookies needed to create an event.
* cq_period - defines the timeout between last event and a new one
that will occur even if cq_max_count was not reached

The patches are available in the git repository at:
git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git tags/rdma-next-2017-10-29-1

Thanks
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Yonatan Cohen (6):
IB/uverbs: Allow CQ moderation with modify CQ
IB/mlx4: Exposing modify CQ callback to uverbs layer
IB/mlx5: Exposing modify CQ callback to uverbs layer
IB/uverbs: Add CQ moderation capability to query_device
IB/mlx4: Add CQ moderation capability to query_device
IB/mlx5: Add CQ moderation capability to query_device

drivers/infiniband/core/uverbs.h | 1 +
drivers/infiniband/core/uverbs_cmd.c | 51 +++++++++++++++++++++++++++++++++++
drivers/infiniband/core/uverbs_main.c | 1 +
drivers/infiniband/hw/mlx4/main.c | 6 +++++
drivers/infiniband/hw/mlx4/mlx4_ib.h | 1 +
drivers/infiniband/hw/mlx5/cq.c | 3 +++
drivers/infiniband/hw/mlx5/main.c | 10 ++++++-
include/linux/mlx4/cq.h | 3 +++
include/linux/mlx5/cq.h | 3 +++
include/rdma/ib_verbs.h | 10 +++++++
include/uapi/rdma/ib_user_verbs.h | 22 ++++++++++++++-
11 files changed, 109 insertions(+), 2 deletions(-)

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2.14.2