Clément Léger 6935f63146 io_uring/zcrx: add shared-memory notification statistics ...

Add support for an optional stats struct embedded in the refill queue
region, allowing userspace to monitor copy-fallback in real-time.

Userspace queries the stats struct size and alignment via
IO_URING_QUERY_ZCRX_NOTIF (notif_stats_size / notif_stats_alignment),
then provides a stats_offset in zcrx_notification_desc pointing to a
location within the refill queue region.

The kernel updates the stats counters in-place on every copy-fallback
event.

Signed-off-by: Clément Léger <cleger@meta.com>
[pavel: rename io_uring_zcrx_notif_stats]
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/f6af5a21015efea4b733b9d77aba22c637788fe4.1779189667.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2026-05-26 10:42:01 -06:00

..

bpf_filter.h

io_uring/net: allow filtering on IORING_OP_CONNECT

2026-05-14 07:23:01 -06:00

mock_file.h

io_uring/mock: add trivial poll handler

2025-07-02 08:10:26 -06:00

query.h

io_uring/zcrx: add shared-memory notification statistics

2026-05-26 10:42:01 -06:00

zcrx.h

io_uring/zcrx: add shared-memory notification statistics

2026-05-26 10:42:01 -06:00