[PATCH net-next v3 0/3] xsk: introduce atomic for cq in generic path

[Jason Xing <kerneljasonxing@gmail.com>]

From: Jason Xing <kernelxing@tencent.com>

This series tries to replace cq_cached_prod_lock spin lock with atomic
operations to get better performance.

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v3
Link: https://lore.kernel.org/all/20251125085431.4039-1-kerneljasonxing@gmail.com/
1. fix one race issue that cannot be resolved by simple seperated atomic
operations. So this revision only updates patch [2/3] and tries to use
try_cmpxchg method to avoid that problem. (paolo)
2. update commit log accordingly.

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         | 23 +++++++++++++++++------
 4 files changed, 22 insertions(+), 30 deletions(-)

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2.41.3