netdev - [PATCH net-next v2 0/3] xsk: introduce atomic for cq in generic path

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Message-Id: <20251125085431.4039-1-kerneljasonxing@gmail.com>
Date: Tue, 25 Nov 2025 16:54:28 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	bjorn@...nel.org,
	magnus.karlsson@...el.com,
	maciej.fijalkowski@...el.com,
	jonathan.lemon@...il.com,
	sdf@...ichev.me,
	ast@...nel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com
Cc: bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next v2 0/3] xsk: introduce atomic for cq in generic path

From: Jason Xing <kernelxing@...cent.com>

In the hot path (that is __xsk_generic_xmit()), playing with spin lock
is time consuming. So this series replaces spin lock with atomic
operations to get better performance.

---
V2
Link: https://lore.kernel.org/all/20251124080858.89593-1-kerneljasonxing@gmail.com/
1. use separate functions rather than branches within shared routines. (Maciej)
2. make each patch as simple as possible for easier review

Jason Xing (3):
  xsk: add atomic cached_prod for copy mode
  xsk: use atomic operations around cached_prod for copy mode
  xsk: remove spin lock protection of cached_prod

 include/net/xsk_buff_pool.h |  5 -----
 net/xdp/xsk.c               | 23 +++++------------------
 net/xdp/xsk_buff_pool.c     |  1 -
 net/xdp/xsk_queue.h         | 27 +++++++++++++++++++++++----
 4 files changed, 28 insertions(+), 28 deletions(-)

-- 
2.41.3