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Tue, 25 Nov 2025 00:54:38 -0800 (PST) Received: from KERNELXING-MB0.tencent.com ([43.132.141.21]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-bd760fafe6dsm15192263a12.34.2025.11.25.00.54.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Nov 2025 00:54:37 -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 Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, Jason Xing Subject: [PATCH net-next v2 0/3] xsk: introduce atomic for cq in generic path Date: Tue, 25 Nov 2025 16:54:28 +0800 Message-Id: <20251125085431.4039-1-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 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