[PATCH 0/2] abstract napi tracking strategy

[Olivier Langlois <olivier@trillion01.com>]

the actual napi tracking strategy is inducing a non-negligeable overhead.
Everytime a multishot poll is triggered or any poll armed, if the napi is
enabled on the ring a lookup is performed to either add a new napi id into
the napi_list or its timeout value is updated.

For many scenarios, this is overkill as the napi id list will be pretty
much static most of the time. To address this common scenario, a new
abstraction has been created following the common Linux kernel idiom of
creating an abstract interface with a struct filled with function pointers.

Creating an alternate napi tracking strategy is therefore made in 2 phases.

1. Introduce the io_napi_tracking_ops interface
2. Implement a static napi tracking by defining a new io_napi_tracking_ops

Olivier Langlois (2):
  io_uring/napi: Introduce io_napi_tracking_ops
  io_uring/napi: add static napi tracking strategy

 include/linux/io_uring_types.h |  12 +-
 include/uapi/linux/io_uring.h  |  30 ++++-
 io_uring/fdinfo.c              |   4 +
 io_uring/napi.c                | 226 +++++++++++++++++++++++++++++----
 io_uring/napi.h                |  11 +-
 5 files changed, 243 insertions(+), 40 deletions(-)

-- 
2.46.0