zcrx update for-7.3

zcrx update for 7.3. Patch 1 fixes RQ processing over-throttling, which shows up with larger page sizes. Patches 2-5 makes the RQ use more scalable for multi-CPU setups, including softirq running on a different CPU from CPU. Patches 9-16 implement dynamic area provisioning.

Pavel Begunkov (16):
io_uring/zcrx: scale refilling with large pages io_uring/zcrx: move RQ head/tail to separate cache lines io_uring/zcrx: add RQ iterator
io_uring/zcrx: cache RQ tail
io_uring/zcrx: coalesce same-niov RQEs on refill io_uring/zcrx: constify area_reg on import io_urint/zcrx: narrow var scope in io_zcrx_recv_skb() io_uring/zcrx: don't reload skb_shinfo io_uring/zcrx: add helper for deriving area token io_uring/zcrx: don't pass ifq_reg to area creation io_uring/zcrx: split dmabuf unmap and release io_uring/zcrx: unmap under netdev lock io_uring/zcrx: move freelist lock to struct zcrx io_uring/zcrx: keep array of areas io_uring/zcrx: lock area creation with pp_lock io_uring/zcrx: add dynamic area provisioning

 include/uapi/linux/io_uring/zcrx.h |   7 +
 io_uring/query.c                   |   2 +-
 io_uring/zcrx.c                    | 398 +++++++++++++++++++++--------
 io_uring/zcrx.h                    |  15 +-
 4 files changed, 305 insertions(+), 117 deletions(-)

2.54.0