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AKwUvBxJqcIVU8YAXrJBN9QJmCp45Bu/zeQPxfQscQhl2uiWEmzEFtURkoYD0WqmPYt7HU4bzJt6rm5DpfB8MSwhlQ==@lists.linux.dev X-Gm-Message-State: APuU4Z8ndkXN259lXJ472T2bOIbAg/5p19tw3aL/u4QvrordqgFzW+jy iO/b4kRAMNhGf23FyE6HdQF/7eItHDRjDeq5jaE6BfocPvKl+YwXQxmwR5tUr+KRbzZ4Q5mP6d1 E8H12ioWqNYl6sUXpN0eUrgEy0A== X-Received: from dlep5-n2.prod.google.com ([2002:a05:701b:4585:20b0:191:63a3:7273]) (user=almasrymina job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:5e09:b0:1a4:3169:cb with SMTP id a92af1059eb24-1ac5cfe5610mr18759756c88.17.1793740465374; Tue, 03 Nov 2026 13:14:25 -0800 (PST) Date: Tue, 3 Nov 2026 21:14:19 +0000 X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 X-Mailer: git-send-email 2.56.0.385.gac671c819a-goog Message-ID: <20261103211424.127627-1-almasrymina@google.com> Subject: [PATCH net-next v1 0/5] net: deprecate skb->pp_recycle and skb_mark_for_recycle() From: Mina Almasry To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org, bpf@vger.kernel.org, linux-wireless@vger.kernel.org, linux-doc@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, imx@lists.linux.dev, linux-rdma@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-omap@vger.kernel.org Cc: Mina Almasry , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Steffen Klassert , Herbert Xu , Willem de Bruijn , Stanislav Fomichev , Pavel Begunkov , Bobby Eshleman , Andrew Lunn , "Michael S. Tsirkin" , Jason Wang , "=?UTF-8?q?Eugenio=20P=C3=A9rez?=" , Xuan Zhuo , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jesper Dangaard Brouer , Ilias Apalodimas , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Sabrina Dubroca , Johannes Berg , Byungchul Park , Jonathan Corbet , Shuah Khan , Randy Dunlap , Lorenzo Bianconi , Wen Gu , Philo Lu , Justin Chen , Florian Fainelli , Vikas Gupta , Michael Chan , Pavan Chebbi , Doug Berger , Nicolai Buchwitz , Satish Kharat , Wei Fang , Frank Li , Shenwei Wang , Joshua Washington , Harshitha Ramamurthy , Jijie Shao , Jian Shen , Fan Gong , Tony Nguyen , Przemek Kitszel , Marcin Wojtas , Russell King , Sunil Goutham , Geetha sowjanya , Ratheesh Kannoth , Subbaraya Sundeep , Bharat Bhushan , Felix Fietkau , Matthias Brugger , AngeloGioacchino Del Regno , Tariq Toukan , Saeed Mahameed , Mark Bloch , Leon Romanovsky , Ido Schimmel , Petr Machata , Horatiu Vultur , UNGLinuxDriver@microchip.com, Daniel Machon , Steen Hegelund , Haiyang Zhang , Wei Liu , Dexuan Cui , Yibo Dong , Brett Creeley , Justin Lai , Larry Chiu , "=?UTF-8?q?Niklas=20S=C3=B6derlund?=" , Paul Barker , Masahisa Kojima , Maxime Chevallier , Maxime Coquelin , Alexandre Torgue , FUJITA Tomonori , Siddharth Vadapalli , Roger Quadros , MD Danish Anwar , Jiawen Wu , Mengyuan Lou , Ronak Doshi , Ryder Lee , Shayne Chen , Sean Wang , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Jordan Rhee , Ankit Garg , Tim Hostetler , Erni Sri Satya Vennela , Eric Joyner , Mohammad Heib , Prabu Thayalan , Chintan Vankar , Nora Schiffer , Alexander Sverdlin , Kevin Hao , Karl Mehltretter , Aleksandr Loktionov , Meghana Malladi , Jacob Keller , StanleyYP Wang Content-Type: text/plain; charset="UTF-8" Remove the per-SKB skb->pp_recycle bitfield and skb_mark_for_recycle() helper, and reference-count netmems directly by their underlying type via netmem_is_pp() inside netmem_inc_ref() and netmem_dec_ref(). This series simplifies SKB and netmem reference counting: - Reclaims 1 bit from struct sk_buff (skb->pp_recycle). - Unifies reference counting of SKB fragment netmems and regular netmems under netmem_inc_ref() and netmem_dec_ref(), eliminating the separate skb_netmem_ref(), skb_netmem_unref(), and skb_mark_for_recycle() APIs. - Removes 110 net lines of non-test/doc code across 63 files (196 insertions, 306 deletions). 1/5: net: skbuff: skip managed zerocopy frags in skb_frag_ref() 2/5: net: skbuff: refcount spliced page_pool frags via skb_pipe_buf_ops 3/5: net: datagram: refcount page_pool frags in zerocopy_fill_skb_from_iter() 4/5: net: remove skb->pp_recycle and consolidate netmem refcounting 5/5: net: remove skb_mark_for_recycle() Mina Almasry (5): net: skbuff: skip managed zerocopy frags in skb_frag_ref() net: skbuff: refcount spliced page_pool frags via skb_pipe_buf_ops net: datagram: refcount page_pool frags in zerocopy_fill_skb_from_iter() net: remove skb->pp_recycle and consolidate netmem refcounting net: remove skb_mark_for_recycle() Documentation/networking/page_pool.rst | 1 - drivers/net/ethernet/airoha/airoha_eth.c | 1 - drivers/net/ethernet/alibaba/eea/eea_rx.c | 3 - .../net/ethernet/broadcom/asp2/bcmasp_intf.c | 1 - .../net/ethernet/broadcom/bnge/bnge_txrx.c | 5 - drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 - .../net/ethernet/broadcom/genet/bcmgenet.c | 2 - drivers/net/ethernet/cisco/enic/enic_rq.c | 1 - drivers/net/ethernet/engleder/tsnep_main.c | 2 - drivers/net/ethernet/freescale/fec_main.c | 1 - drivers/net/ethernet/google/gve/gve_rx_dqo.c | 9 - .../net/ethernet/hisilicon/hibmcge/hbg_txrx.c | 1 - .../net/ethernet/hisilicon/hns3/hns3_enet.c | 6 - .../net/ethernet/huawei/hinic3/hinic3_rx.c | 1 - drivers/net/ethernet/intel/iavf/iavf_txrx.c | 2 - drivers/net/ethernet/marvell/mvneta.c | 2 - .../net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 - .../marvell/octeontx2/nic/otx2_txrx.c | 1 - drivers/net/ethernet/mediatek/mtk_eth_soc.c | 1 - drivers/net/ethernet/mellanox/mlx4/en_rx.c | 1 - .../net/ethernet/mellanox/mlx5/core/en_rx.c | 8 - drivers/net/ethernet/mellanox/mlxsw/pci.c | 2 - .../ethernet/microchip/lan966x/lan966x_fdma.c | 2 - .../microchip/sparx5/lan969x/lan969x_fdma.c | 1 - drivers/net/ethernet/microsoft/mana/mana_en.c | 3 - .../net/ethernet/mucse/rnpgbe/rnpgbe_lib.c | 1 - .../net/ethernet/pensando/ionic/ionic_txrx.c | 2 - .../net/ethernet/realtek/rtase/rtase_main.c | 1 - drivers/net/ethernet/renesas/ravb_main.c | 2 - drivers/net/ethernet/socionext/netsec.c | 1 - .../net/ethernet/stmicro/stmmac/stmmac_main.c | 1 - drivers/net/ethernet/tehuti/tn40.c | 1 - drivers/net/ethernet/ti/am65-cpsw-nuss.c | 1 - drivers/net/ethernet/ti/cpsw.c | 2 - drivers/net/ethernet/ti/cpsw_new.c | 2 - drivers/net/ethernet/ti/icssg/icssg_common.c | 1 - drivers/net/ethernet/wangxun/libwx/wx_lib.c | 2 - drivers/net/veth.c | 3 +- drivers/net/virtio_net.c | 16 +- drivers/net/vmxnet3/vmxnet3_xdp.c | 1 - drivers/net/wireless/mediatek/mt76/dma.c | 1 - .../net/wireless/mediatek/mt76/mt7996/mac.c | 1 - drivers/net/wireless/mediatek/mt76/npu.c | 1 - drivers/net/wireless/mediatek/mt76/usb.c | 1 - drivers/net/xen-netfront.c | 1 - include/linux/mm.h | 2 +- include/linux/skbuff.h | 12 +- include/linux/skbuff_ref.h | 60 +-- include/net/netmem.h | 39 +- include/net/page_pool/helpers.h | 46 ++- net/core/datagram.c | 5 + net/core/gro.c | 9 - net/core/net_test.c | 369 +++++++++++------- net/core/netmem_priv.h | 23 +- net/core/page_pool.c | 8 +- net/core/skbuff.c | 78 ++-- net/core/xdp.c | 13 +- net/ipv4/esp4.c | 11 +- net/ipv6/esp6.c | 11 +- net/tls/tls_device.c | 14 +- net/tls/tls_device_fallback.c | 6 +- net/tls/tls_main.c | 4 +- net/wireless/util.c | 31 +- net/xfrm/trace_iptfs.h | 6 +- net/xfrm/xfrm_iptfs.c | 16 +- 65 files changed, 418 insertions(+), 454 deletions(-) base-commit: 7b6ab4dbc156e2f96419715130b3d5738a306c93 -- 2.56.0.385.gac671c819a-goog