netdev - [PATCH io_uring for-6.18 00/20] zcrx for-6.18 updates

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Message-ID: <cover.1758030357.git.asml.silence@gmail.com>
Date: Tue, 16 Sep 2025 15:27:43 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: io-uring@...r.kernel.org
Cc: asml.silence@...il.com,
	axboe@...nel.dk,
	netdev@...r.kernel.org
Subject: [PATCH io_uring for-6.18 00/20] zcrx for-6.18 updates

A bunch of assorted zcrx patches for 6.18, which includes
- Improve refill entry alignment for better caching (Patch 1)
- Various cleanups, especially around deduplicating normal memory vs
  dmabuf setup.
- Generalisation of the niov size (Patch 12). It's still hard coded to
  PAGE_SIZE on init, but will let the user to specify the rx buffer
  length on setup.
- Syscall / synchronous bufer return (Patch 19). It'll be used as a
  slow fallback path for returning buffers when the refill queue is
  full. Useful for tolerating slight queue size misconfiguration or
  with inconsistent load.
- Accounting more memory to cgroups (Patch 20)
- Additional independent cleanups that will also be useful for
  mutli-area support.

Pavel Begunkov (20):
  io_uring/zcrx: improve rqe cache alignment
  io_uring/zcrx: replace memchar_inv with is_zero
  io_uring/zcrx: use page_pool_unref_and_test()
  io_uring/zcrx: remove extra io_zcrx_drop_netdev
  io_uring/zcrx: don't pass slot to io_zcrx_create_area
  io_uring/zcrx: move area reg checks into io_import_area
  io_uring/zcrx: check all niovs filled with dma addresses
  io_uring/zcrx: pass ifq to io_zcrx_alloc_fallback()
  io_uring/zcrx: deduplicate area mapping
  io_uring/zcrx: remove dmabuf_offset
  io_uring/zcrx: set sgt for umem area
  io_uring/zcrx: make niov size variable
  io_uring/zcrx: rename dma lock
  io_uring/zcrx: protect netdev with pp_lock
  io_uring/zcrx: reduce netmem scope in refill
  io_uring/zcrx: use guards for the refill lock
  io_uring/zcrx: don't adjust free cache space
  io_uring/zcrx: introduce io_parse_rqe()
  io_uring/zcrx: allow synchronous buffer return
  io_uring/zcrx: account niov arrays to cgroup

 include/uapi/linux/io_uring.h |  12 ++
 io_uring/register.c           |   3 +
 io_uring/zcrx.c               | 285 +++++++++++++++++++++-------------
 io_uring/zcrx.h               |  19 ++-
 4 files changed, 211 insertions(+), 108 deletions(-)

-- 
2.49.0