[zcrx-next 0/2] add support for synchronous refill

[Pavel Begunkov <asml.silence@gmail.com>]

Returning buffers via a ring is efficient but can cause problems
when the ring doesn't have space. Add a way to return buffers
synchronously via io_uring "register" syscall, which should serve
as a slow fallback path.

For a full branch with all relevant dependencies see
https://github.com/isilence/linux.git zcrx/for-next

Pavel Begunkov (2):
  io_uring/zcrx: introduce io_parse_rqe()
  io_uring/zcrx: allow synchronous buffer return

 include/uapi/linux/io_uring.h |  10 ++++
 io_uring/register.c           |   3 +
 io_uring/zcrx.c               | 100 +++++++++++++++++++++++++++++-----
 io_uring/zcrx.h               |   7 +++
 4 files changed, 107 insertions(+), 13 deletions(-)

-- 
2.49.0