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Fri, 28 Nov 2025 05:46:08 -0800 (PST) Received: from KERNELXING-MC1.tencent.com ([114.253.35.215]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-be4fbde37d7sm4792674a12.13.2025.11.28.05.46.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Nov 2025 05:46:08 -0800 (PST) From: Jason Xing To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, bjorn@kernel.org, magnus.karlsson@intel.com, maciej.fijalkowski@intel.com, jonathan.lemon@gmail.com, sdf@fomichev.me, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, horms@kernel.org, andrew+netdev@lunn.ch Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, Jason Xing Subject: [PATCH net-next v3 0/3] xsk: introduce atomic for cq in generic path Date: Fri, 28 Nov 2025 21:45:58 +0800 Message-Id: <20251128134601.54678-1-kerneljasonxing@gmail.com> X-Mailer: git-send-email 2.33.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jason Xing This series tries to replace cq_cached_prod_lock spin lock with atomic operations to get better performance. --- 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(-) -- 2.41.3