From: Coco Li <lixiaoyan@google.com>
Date: Wed, 29 Nov 2023 07:27:52 +0000
Subject: Documentations: Analyze heavily used Networking related structs
Patch-mainline: v6.8-rc1
Git-commit: 14006f1d8fa24a2320781ad503ca1cba92e940d2
References: jsc#PED-7574
Analyzed a few structs in the networking stack by looking at variables
within them that are used in the TCP/IP fast path.
Fast path is defined as TCP path where data is transferred from sender to
receiver unidirectionally. It doesn't include phases other than
TCP_ESTABLISHED, nor does it look at error paths.
We hope to re-organizing variables that span many cachelines whose fast
path variables are also spread out, and this document can help future
developers keep networking fast path cachelines small.
Optimized_cacheline field is computed as
(Fastpath_Bytes/L3_cacheline_size_x86), and not the actual organized
results (see patches to come for these).
Investigation is done on 6.5
Name Struct_Cachelines Cur_fastpath_cache Fastpath_Bytes Optimized_cacheline
tcp_sock 42 (2664 Bytes) 12 396 8
net_device 39 (2240 bytes) 12 234 4
inet_sock 15 (960 bytes) 14 922 14
Inet_connection_sock 22 (1368 bytes) 18 1166 18
Netns_ipv4 (sysctls) 12 (768 bytes) 4 77 2
linux_mib 16 (1060) 6 104 2
Note how there isn't much improvement space for inet_sock and
Inet_connection_sock because sk and icsk_inet respectively takes up so
much of the struct that rest of the variables become a small portion of
the struct size.
So, we decided to reorganize tcp_sock, net_device, netns_ipv4
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Coco Li <lixiaoyan@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
Documentation/networking/index.rst | 1
Documentation/networking/net_cachelines/index.rst | 15
Documentation/networking/net_cachelines/inet_connection_sock.rst | 49 ++
Documentation/networking/net_cachelines/inet_sock.rst | 43 ++
Documentation/networking/net_cachelines/net_device.rst | 177 ++++++++++
Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst | 157 ++++++++
Documentation/networking/net_cachelines/snmp.rst | 134 +++++++
Documentation/networking/net_cachelines/tcp_sock.rst | 156 ++++++++
MAINTAINERS | 3
9 files changed, 735 insertions(+)
create mode 100644 Documentation/networking/net_cachelines/index.rst
create mode 100644 Documentation/networking/net_cachelines/inet_connection_sock.rst
create mode 100644 Documentation/networking/net_cachelines/inet_sock.rst
create mode 100644 Documentation/networking/net_cachelines/net_device.rst
create mode 100644 Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst
create mode 100644 Documentation/networking/net_cachelines/snmp.rst
create mode 100644 Documentation/networking/net_cachelines/tcp_sock.rst
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -75,6 +75,7 @@ Contents:
mptcp-sysctl
multiqueue
napi
+ net_cachelines/index
netconsole
netdev-features
netdevices
--- /dev/null
+++ b/Documentation/networking/net_cachelines/index.rst
@@ -0,0 +1,15 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+===================================
+Common Networking Struct Cachelines
+===================================
+
+.. toctree::
+ :maxdepth: 1
+
+ inet_connection_sock
+ inet_sock
+ net_device
+ netns_ipv4_sysctl
+ snmp
+ tcp_sock
--- /dev/null
+++ b/Documentation/networking/net_cachelines/inet_connection_sock.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+=====================================================
+inet_connection_sock struct fast path usage breakdown
+=====================================================
+
+Type Name fastpath_tx_access fastpath_rx_access comment
+..struct ..inet_connection_sock
+struct_inet_sock icsk_inet read_mostly read_mostly tcp_init_buffer_space,tcp_init_transfer,tcp_finish_connect,tcp_connect,tcp_send_rcvq,tcp_send_syn_data
+struct_request_sock_queue icsk_accept_queue - -
+struct_inet_bind_bucket icsk_bind_hash read_mostly - tcp_set_state
+struct_inet_bind2_bucket icsk_bind2_hash read_mostly - tcp_set_state,inet_put_port
+unsigned_long icsk_timeout read_mostly - inet_csk_reset_xmit_timer,tcp_connect
+struct_timer_list icsk_retransmit_timer read_mostly - inet_csk_reset_xmit_timer,tcp_connect
+struct_timer_list icsk_delack_timer read_mostly - inet_csk_reset_xmit_timer,tcp_connect
+u32 icsk_rto read_write - tcp_cwnd_validate,tcp_schedule_loss_probe,tcp_connect_init,tcp_connect,tcp_write_xmit,tcp_push_one
+u32 icsk_rto_min - -
+u32 icsk_delack_max - -
+u32 icsk_pmtu_cookie read_write - tcp_sync_mss,tcp_current_mss,tcp_send_syn_data,tcp_connect_init,tcp_connect
+struct_tcp_congestion_ops icsk_ca_ops read_write - tcp_cwnd_validate,tcp_tso_segs,tcp_ca_dst_init,tcp_connect_init,tcp_connect,tcp_write_xmit
+struct_inet_connection_sock_af_ops icsk_af_ops read_mostly - tcp_finish_connect,tcp_send_syn_data,tcp_mtup_init,tcp_mtu_check_reprobe,tcp_mtu_probe,tcp_connect_init,tcp_connect,__tcp_transmit_skb
+struct_tcp_ulp_ops* icsk_ulp_ops - -
+void* icsk_ulp_data - -
+u8:5 icsk_ca_state read_write - tcp_cwnd_application_limited,tcp_set_ca_state,tcp_enter_cwr,tcp_tso_should_defer,tcp_mtu_probe,tcp_schedule_loss_probe,tcp_write_xmit,__tcp_transmit_skb
+u8:1 icsk_ca_initialized read_write - tcp_init_transfer,tcp_init_congestion_control,tcp_init_transfer,tcp_finish_connect,tcp_connect
+u8:1 icsk_ca_setsockopt - -
+u8:1 icsk_ca_dst_locked write_mostly - tcp_ca_dst_init,tcp_connect_init,tcp_connect
+u8 icsk_retransmits write_mostly - tcp_connect_init,tcp_connect
+u8 icsk_pending read_write - inet_csk_reset_xmit_timer,tcp_connect,tcp_check_probe_timer,__tcp_push_pending_frames,tcp_rearm_rto,tcp_event_new_data_sent,tcp_event_new_data_sent
+u8 icsk_backoff write_mostly - tcp_write_queue_purge,tcp_connect_init
+u8 icsk_syn_retries - -
+u8 icsk_probes_out - -
+u16 icsk_ext_hdr_len read_mostly - __tcp_mtu_to_mss,tcp_mtu_to_rss,tcp_mtu_probe,tcp_write_xmit,tcp_mtu_to_mss,
+struct_icsk_ack_u8 pending read_write read_write inet_csk_ack_scheduled,__tcp_cleanup_rbuf,tcp_cleanup_rbuf,inet_csk_clear_xmit_timer,tcp_event_ack-sent,inet_csk_reset_xmit_timer
+struct_icsk_ack_u8 quick read_write write_mostly tcp_dec_quickack_mode,tcp_event_ack_sent,__tcp_transmit_skb,__tcp_select_window,__tcp_cleanup_rbuf
+struct_icsk_ack_u8 pingpong - -
+struct_icsk_ack_u8 retry write_mostly read_write inet_csk_clear_xmit_timer,tcp_rearm_rto,tcp_event_new_data_sent,tcp_write_xmit,__tcp_send_ack,tcp_send_ack,
+struct_icsk_ack_u8 ato read_mostly write_mostly tcp_dec_quickack_mode,tcp_event_ack_sent,__tcp_transmit_skb,__tcp_send_ack,tcp_send_ack
+struct_icsk_ack_unsigned_long timeout read_write read_write inet_csk_reset_xmit_timer,tcp_connect
+struct_icsk_ack_u32 lrcvtime read_write - tcp_finish_connect,tcp_connect,tcp_event_data_sent,__tcp_transmit_skb
+struct_icsk_ack_u16 rcv_mss write_mostly read_mostly __tcp_select_window,__tcp_cleanup_rbuf,tcp_initialize_rcv_mss,tcp_connect_init
+struct_icsk_mtup_int search_high read_write - tcp_mtup_init,tcp_sync_mss,tcp_connect_init,tcp_mtu_check_reprobe,tcp_write_xmit
+struct_icsk_mtup_int search_low read_write - tcp_mtu_probe,tcp_mtu_check_reprobe,tcp_write_xmit,tcp_sync_mss,tcp_connect_init,tcp_mtup_init
+struct_icsk_mtup_u32:31 probe_size read_write - tcp_mtup_init,tcp_connect_init,__tcp_transmit_skb
+struct_icsk_mtup_u32:1 enabled read_write - tcp_mtup_init,tcp_sync_mss,tcp_connect_init,tcp_mtu_probe,tcp_write_xmit
+struct_icsk_mtup_u32 probe_timestamp read_write - tcp_mtup_init,tcp_connect_init,tcp_mtu_check_reprobe,tcp_mtu_probe
+u32 icsk_probes_tstamp - -
+u32 icsk_user_timeout - -
+u64[104/sizeof(u64)] icsk_ca_priv - -
--- /dev/null
+++ b/Documentation/networking/net_cachelines/inet_sock.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+=====================================================
+inet_connection_sock struct fast path usage breakdown
+=====================================================
+
+Type Name fastpath_tx_access fastpath_rx_access comment
+..struct ..inet_sock
+struct_sock sk read_mostly read_mostly tcp_init_buffer_space,tcp_init_transfer,tcp_finish_connect,tcp_connect,tcp_send_rcvq,tcp_send_syn_data
+struct_ipv6_pinfo* pinet6 - -
+be16 inet_sport read_mostly - __tcp_transmit_skb
+be32 inet_daddr read_mostly - ip_select_ident_segs
+be32 inet_rcv_saddr - -
+be16 inet_dport read_mostly - __tcp_transmit_skb
+u16 inet_num - -
+be32 inet_saddr - -
+s16 uc_ttl read_mostly - __ip_queue_xmit/ip_select_ttl
+u16 cmsg_flags - -
+struct_ip_options_rcu* inet_opt read_mostly - __ip_queue_xmit
+u16 inet_id read_mostly - ip_select_ident_segs
+u8 tos read_mostly - ip_queue_xmit
+u8 min_ttl - -
+u8 mc_ttl - -
+u8 pmtudisc - -
+u8:1 recverr - -
+u8:1 is_icsk - -
+u8:1 freebind - -
+u8:1 hdrincl - -
+u8:1 mc_loop - -
+u8:1 transparent - -
+u8:1 mc_all - -
+u8:1 nodefrag - -
+u8:1 bind_address_no_port - -
+u8:1 recverr_rfc4884 - -
+u8:1 defer_connect read_mostly - tcp_sendmsg_fastopen
+u8 rcv_tos - -
+u8 convert_csum - -
+int uc_index - -
+int mc_index - -
+be32 mc_addr - -
+struct_ip_mc_socklist* mc_list - -
+struct_inet_cork_full cork read_mostly - __tcp_transmit_skb
+struct local_port_range - -
--- /dev/null
+++ b/Documentation/networking/net_cachelines/net_device.rst
@@ -0,0 +1,177 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+===========================================
+net_device struct fast path usage breakdown
+===========================================
+
+Type Name fastpath_tx_access fastpath_rx_access Comments
+..struct ..net_device
+char name[16] - -
+struct_netdev_name_node* name_node
+struct_dev_ifalias* ifalias
+unsigned_long mem_end
+unsigned_long mem_start
+unsigned_long base_addr
+unsigned_long state
+struct_list_head dev_list
+struct_list_head napi_list
+struct_list_head unreg_list
+struct_list_head close_list
+struct_list_head ptype_all read_mostly - dev_nit_active(tx)
+struct_list_head ptype_specific read_mostly deliver_ptype_list_skb/__netif_receive_skb_core(rx)
+struct adj_list
+unsigned_int flags read_mostly read_mostly __dev_queue_xmit,__dev_xmit_skb,ip6_output,__ip6_finish_output(tx);ip6_rcv_core(rx)
+xdp_features_t xdp_features
+unsigned_long_long priv_flags read_mostly - __dev_queue_xmit(tx)
+struct_net_device_ops* netdev_ops read_mostly - netdev_core_pick_tx,netdev_start_xmit(tx)
+struct_xdp_metadata_ops* xdp_metadata_ops
+int ifindex - read_mostly ip6_rcv_core
+unsigned_short gflags
+unsigned_short hard_header_len read_mostly read_mostly ip6_xmit(tx);gro_list_prepare(rx)
+unsigned_int mtu read_mostly - ip_finish_output2
+unsigned_short needed_headroom read_mostly - LL_RESERVED_SPACE/ip_finish_output2
+unsigned_short needed_tailroom
+netdev_features_t features read_mostly read_mostly HARD_TX_LOCK,netif_skb_features,sk_setup_caps(tx);netif_elide_gro(rx)
+netdev_features_t hw_features
+netdev_features_t wanted_features
+netdev_features_t vlan_features
+netdev_features_t hw_enc_features - - netif_skb_features
+netdev_features_t mpls_features
+netdev_features_t gso_partial_features
+unsigned_int min_mtu
+unsigned_int max_mtu
+unsigned_short type
+unsigned_char min_header_len
+unsigned_char name_assign_type
+int group
+struct_net_device_stats stats
+struct_net_device_core_stats* core_stats
+atomic_t carrier_up_count
+atomic_t carrier_down_count
+struct_iw_handler_def* wireless_handlers
+struct_iw_public_data* wireless_data
+struct_ethtool_ops* ethtool_ops
+struct_l3mdev_ops* l3mdev_ops
+struct_ndisc_ops* ndisc_ops
+struct_xfrmdev_ops* xfrmdev_ops
+struct_tlsdev_ops* tlsdev_ops
+struct_header_ops* header_ops read_mostly - ip_finish_output2,ip6_finish_output2(tx)
+unsigned_char operstate
+unsigned_char link_mode
+unsigned_char if_port
+unsigned_char dma
+unsigned_char perm_addr[32]
+unsigned_char addr_assign_type
+unsigned_char addr_len
+unsigned_char upper_level
+unsigned_char lower_level
+unsigned_short neigh_priv_len
+unsigned_short padded
+unsigned_short dev_id
+unsigned_short dev_port
+spinlock_t addr_list_lock
+int irq
+struct_netdev_hw_addr_list uc
+struct_netdev_hw_addr_list mc
+struct_netdev_hw_addr_list dev_addrs
+struct_kset* queues_kset
+struct_list_head unlink_list
+unsigned_int promiscuity
+unsigned_int allmulti
+bool uc_promisc
+unsigned_char nested_level
+struct_in_device* ip_ptr read_mostly read_mostly __in_dev_get
+struct_inet6_dev* ip6_ptr read_mostly read_mostly __in6_dev_get
+struct_vlan_info* vlan_info
+struct_dsa_port* dsa_ptr
+struct_tipc_bearer* tipc_ptr
+void* atalk_ptr
+void* ax25_ptr
+struct_wireless_dev* ieee80211_ptr
+struct_wpan_dev* ieee802154_ptr
+struct_mpls_dev* mpls_ptr
+struct_mctp_dev* mctp_ptr
+unsigned_char* dev_addr
+struct_netdev_queue* _rx read_mostly - netdev_get_rx_queue(rx)
+unsigned_int num_rx_queues
+unsigned_int real_num_rx_queues - read_mostly get_rps_cpu
+struct_bpf_prog* xdp_prog
+unsigned_long gro_flush_timeout - read_mostly napi_complete_done
+int napi_defer_hard_irqs - read_mostly napi_complete_done
+unsigned_int gro_max_size - read_mostly skb_gro_receive
+unsigned_int gro_ipv4_max_size - read_mostly skb_gro_receive
+rx_handler_func_t* rx_handler read_mostly - __netif_receive_skb_core
+void* rx_handler_data read_mostly -
+struct_netdev_queue* ingress_queue read_mostly -
+struct_bpf_mprog_entry tcx_ingress - read_mostly sch_handle_ingress
+struct_nf_hook_entries* nf_hooks_ingress
+unsigned_char broadcast[32]
+struct_cpu_rmap* rx_cpu_rmap
+struct_hlist_node index_hlist
+struct_netdev_queue* _tx read_mostly - netdev_get_tx_queue(tx)
+unsigned_int num_tx_queues - -
+unsigned_int real_num_tx_queues read_mostly - skb_tx_hash,netdev_core_pick_tx(tx)
+unsigned_int tx_queue_len
+spinlock_t tx_global_lock
+struct_xdp_dev_bulk_queue__percpu* xdp_bulkq
+struct_xps_dev_maps* xps_maps[2] read_mostly - __netif_set_xps_queue
+struct_bpf_mprog_entry tcx_egress read_mostly - sch_handle_egress
+struct_nf_hook_entries* nf_hooks_egress read_mostly -
+struct_hlist_head qdisc_hash[16]
+struct_timer_list watchdog_timer
+int watchdog_timeo
+u32 proto_down_reason
+struct_list_head todo_list
+int__percpu* pcpu_refcnt
+refcount_t dev_refcnt
+struct_ref_tracker_dir refcnt_tracker
+struct_list_head link_watch_list
+enum:8 reg_state
+bool dismantle
+enum:16 rtnl_link_state
+bool needs_free_netdev
+void*priv_destructor struct_net_device
+struct_netpoll_info* npinfo - read_mostly napi_poll/napi_poll_lock
+possible_net_t nd_net - read_mostly (dev_net)napi_busy_loop,tcp_v(4/6)_rcv,ip(v6)_rcv,ip(6)_input,ip(6)_input_finish
+void* ml_priv
+enum_netdev_ml_priv_type ml_priv_type
+struct_pcpu_lstats__percpu* lstats
+struct_pcpu_sw_netstats__percpu* tstats
+struct_pcpu_dstats__percpu* dstats
+struct_garp_port* garp_port
+struct_mrp_port* mrp_port
+struct_dm_hw_stat_delta* dm_private
+struct_device dev - -
+struct_attribute_group* sysfs_groups[4]
+struct_attribute_group* sysfs_rx_queue_group
+struct_rtnl_link_ops* rtnl_link_ops
+unsigned_int gso_max_size read_mostly - sk_dst_gso_max_size
+unsigned_int tso_max_size
+u16 gso_max_segs read_mostly - gso_max_segs
+u16 tso_max_segs
+unsigned_int gso_ipv4_max_size read_mostly - sk_dst_gso_max_size
+struct_dcbnl_rtnl_ops* dcbnl_ops
+s16 num_tc read_mostly - skb_tx_hash
+struct_netdev_tc_txq tc_to_txq[16] read_mostly - skb_tx_hash
+u8 prio_tc_map[16]
+unsigned_int fcoe_ddp_xid
+struct_netprio_map* priomap
+struct_phy_device* phydev
+struct_sfp_bus* sfp_bus
+struct_lock_class_key* qdisc_tx_busylock
+bool proto_down
+unsigned:1 wol_enabled
+unsigned:1 threaded - - napi_poll(napi_enable,dev_set_threaded)
+struct_list_head net_notifier_list
+struct_macsec_ops* macsec_ops
+struct_udp_tunnel_nic_info* udp_tunnel_nic_info
+struct_udp_tunnel_nic* udp_tunnel_nic
+unsigned_int xdp_zc_max_segs
+struct_bpf_xdp_entity xdp_state[3]
+u8 dev_addr_shadow[32]
+netdevice_tracker linkwatch_dev_tracker
+netdevice_tracker watchdog_dev_tracker
+netdevice_tracker dev_registered_tracker
+struct_rtnl_hw_stats64* offload_xstats_l3
+struct_devlink_port* devlink_port
+struct_dpll_pin* dpll_pin
--- /dev/null
+++ b/Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst
@@ -0,0 +1,157 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+===========================================
+netns_ipv4 struct fast path usage breakdown
+===========================================
+
+Type Name fastpath_tx_access fastpath_rx_access comment
+..struct ..netns_ipv4
+struct_inet_timewait_death_row tcp_death_row
+struct_udp_table* udp_table
+struct_ctl_table_header* forw_hdr
+struct_ctl_table_header* frags_hdr
+struct_ctl_table_header* ipv4_hdr
+struct_ctl_table_header* route_hdr
+struct_ctl_table_header* xfrm4_hdr
+struct_ipv4_devconf* devconf_all
+struct_ipv4_devconf* devconf_dflt
+struct_ip_ra_chain ra_chain
+struct_mutex ra_mutex
+struct_fib_rules_ops* rules_ops
+struct_fib_table fib_main
+struct_fib_table fib_default
+unsigned_int fib_rules_require_fldissect
+bool fib_has_custom_rules
+bool fib_has_custom_local_routes
+bool fib_offload_disabled
+atomic_t fib_num_tclassid_users
+struct_hlist_head* fib_table_hash
+struct_sock* fibnl
+struct_sock* mc_autojoin_sk
+struct_inet_peer_base* peers
+struct_fqdir* fqdir
+u8 sysctl_icmp_echo_ignore_all
+u8 sysctl_icmp_echo_enable_probe
+u8 sysctl_icmp_echo_ignore_broadcasts
+u8 sysctl_icmp_ignore_bogus_error_responses
+u8 sysctl_icmp_errors_use_inbound_ifaddr
+int sysctl_icmp_ratelimit
+int sysctl_icmp_ratemask
+u32 ip_rt_min_pmtu - -
+int ip_rt_mtu_expires - -
+int ip_rt_min_advmss - -
+struct_local_ports ip_local_ports - -
+u8 sysctl_tcp_ecn - -
+u8 sysctl_tcp_ecn_fallback - -
+u8 sysctl_ip_default_ttl - - ip4_dst_hoplimit/ip_select_ttl
+u8 sysctl_ip_no_pmtu_disc - -
+u8 sysctl_ip_fwd_use_pmtu read_mostly - ip_dst_mtu_maybe_forward/ip_skb_dst_mtu
+u8 sysctl_ip_fwd_update_priority - - ip_forward
+u8 sysctl_ip_nonlocal_bind - -
+u8 sysctl_ip_autobind_reuse - -
+u8 sysctl_ip_dynaddr - -
+u8 sysctl_ip_early_demux - read_mostly ip(6)_rcv_finish_core
+u8 sysctl_raw_l3mdev_accept - -
+u8 sysctl_tcp_early_demux - read_mostly ip(6)_rcv_finish_core
+u8 sysctl_udp_early_demux
+u8 sysctl_nexthop_compat_mode - -
+u8 sysctl_fwmark_reflect - -
+u8 sysctl_tcp_fwmark_accept - -
+u8 sysctl_tcp_l3mdev_accept - -
+u8 sysctl_tcp_mtu_probing - -
+int sysctl_tcp_mtu_probe_floor - -
+int sysctl_tcp_base_mss - -
+int sysctl_tcp_min_snd_mss read_mostly - __tcp_mtu_to_mss(tcp_write_xmit)
+int sysctl_tcp_probe_threshold - - tcp_mtu_probe(tcp_write_xmit)
+u32 sysctl_tcp_probe_interval - - tcp_mtu_check_reprobe(tcp_write_xmit)
+int sysctl_tcp_keepalive_time - -
+int sysctl_tcp_keepalive_intvl - -
+u8 sysctl_tcp_keepalive_probes - -
+u8 sysctl_tcp_syn_retries - -
+u8 sysctl_tcp_synack_retries - -
+u8 sysctl_tcp_syncookies - - generated_on_syn
+u8 sysctl_tcp_migrate_req - - reuseport
+u8 sysctl_tcp_comp_sack_nr - - __tcp_ack_snd_check
+int sysctl_tcp_reordering - read_mostly tcp_may_raise_cwnd/tcp_cong_control
+u8 sysctl_tcp_retries1 - -
+u8 sysctl_tcp_retries2 - -
+u8 sysctl_tcp_orphan_retries - -
+u8 sysctl_tcp_tw_reuse - - timewait_sock_ops
+int sysctl_tcp_fin_timeout - - TCP_LAST_ACK/tcp_rcv_state_process
+unsigned_int sysctl_tcp_notsent_lowat read_mostly - tcp_notsent_lowat/tcp_stream_memory_free
+u8 sysctl_tcp_sack - - tcp_syn_options
+u8 sysctl_tcp_window_scaling - - tcp_syn_options,tcp_parse_options
+u8 sysctl_tcp_timestamps
+u8 sysctl_tcp_early_retrans read_mostly - tcp_schedule_loss_probe(tcp_write_xmit)
+u8 sysctl_tcp_recovery - - tcp_fastretrans_alert
+u8 sysctl_tcp_thin_linear_timeouts - - tcp_retrans_timer(on_thin_streams)
+u8 sysctl_tcp_slow_start_after_idle - - unlikely(tcp_cwnd_validate-network-not-starved)
+u8 sysctl_tcp_retrans_collapse - -
+u8 sysctl_tcp_stdurg - - unlikely(tcp_check_urg)
+u8 sysctl_tcp_rfc1337 - -
+u8 sysctl_tcp_abort_on_overflow - -
+u8 sysctl_tcp_fack - -
+int sysctl_tcp_max_reordering - - tcp_check_sack_reordering
+int sysctl_tcp_adv_win_scale - - tcp_init_buffer_space
+u8 sysctl_tcp_dsack - - partial_packet_or_retrans_in_tcp_data_queue
+u8 sysctl_tcp_app_win - - tcp_win_from_space
+u8 sysctl_tcp_frto - - tcp_enter_loss
+u8 sysctl_tcp_nometrics_save - - TCP_LAST_ACK/tcp_update_metrics
+u8 sysctl_tcp_no_ssthresh_metrics_save - - TCP_LAST_ACK/tcp_(update/init)_metrics
+u8 sysctl_tcp_moderate_rcvbuf read_mostly read_mostly tcp_tso_should_defer(tx);tcp_rcv_space_adjust(rx)
+u8 sysctl_tcp_tso_win_divisor read_mostly - tcp_tso_should_defer(tcp_write_xmit)
+u8 sysctl_tcp_workaround_signed_windows - - tcp_select_window
+int sysctl_tcp_limit_output_bytes read_mostly - tcp_small_queue_check(tcp_write_xmit)
+int sysctl_tcp_challenge_ack_limit - -
+int sysctl_tcp_min_rtt_wlen read_mostly - tcp_ack_update_rtt
+u8 sysctl_tcp_min_tso_segs - - unlikely(icsk_ca_ops-written)
+u8 sysctl_tcp_tso_rtt_log read_mostly - tcp_tso_autosize
+u8 sysctl_tcp_autocorking read_mostly - tcp_push/tcp_should_autocork
+u8 sysctl_tcp_reflect_tos - - tcp_v(4/6)_send_synack
+int sysctl_tcp_invalid_ratelimit - -
+int sysctl_tcp_pacing_ss_ratio - - default_cong_cont(tcp_update_pacing_rate)
+int sysctl_tcp_pacing_ca_ratio - - default_cong_cont(tcp_update_pacing_rate)
+int sysctl_tcp_wmem[3] read_mostly - tcp_wmem_schedule(sendmsg/sendpage)
+int sysctl_tcp_rmem[3] - read_mostly __tcp_grow_window(tx),tcp_rcv_space_adjust(rx)
+unsigned_int sysctl_tcp_child_ehash_entries
+unsigned_long sysctl_tcp_comp_sack_delay_ns - - __tcp_ack_snd_check
+unsigned_long sysctl_tcp_comp_sack_slack_ns - - __tcp_ack_snd_check
+int sysctl_max_syn_backlog - -
+int sysctl_tcp_fastopen - -
+struct_tcp_congestion_ops tcp_congestion_control - - init_cc
+struct_tcp_fastopen_context tcp_fastopen_ctx - -
+unsigned_int sysctl_tcp_fastopen_blackhole_timeout - -
+atomic_t tfo_active_disable_times - -
+unsigned_long tfo_active_disable_stamp - -
+u32 tcp_challenge_timestamp - -
+u32 tcp_challenge_count - -
+u8 sysctl_tcp_plb_enabled - -
+u8 sysctl_tcp_plb_idle_rehash_rounds - -
+u8 sysctl_tcp_plb_rehash_rounds - -
+u8 sysctl_tcp_plb_suspend_rto_sec - -
+int sysctl_tcp_plb_cong_thresh - -
+int sysctl_udp_wmem_min
+int sysctl_udp_rmem_min
+u8 sysctl_fib_notify_on_flag_change
+u8 sysctl_udp_l3mdev_accept
+u8 sysctl_igmp_llm_reports
+int sysctl_igmp_max_memberships
+int sysctl_igmp_max_msf
+int sysctl_igmp_qrv
+struct_ping_group_range ping_group_range
+atomic_t dev_addr_genid
+unsigned_int sysctl_udp_child_hash_entries
+unsigned_long* sysctl_local_reserved_ports
+int sysctl_ip_prot_sock
+struct_mr_table* mrt
+struct_list_head mr_tables
+struct_fib_rules_ops* mr_rules_ops
+u32 sysctl_fib_multipath_hash_fields
+u8 sysctl_fib_multipath_use_neigh
+u8 sysctl_fib_multipath_hash_policy
+struct_fib_notifier_ops* notifier_ops
+unsigned_int fib_seq
+struct_fib_notifier_ops* ipmr_notifier_ops
+unsigned_int ipmr_seq
+atomic_t rt_genid
+siphash_key_t ip_id_key
--- /dev/null
+++ b/Documentation/networking/net_cachelines/snmp.rst
@@ -0,0 +1,134 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+===========================================
+netns_ipv4 enum fast path usage breakdown
+===========================================
+
+Type Name fastpath_tx_access fastpath_rx_access comment
+..enum
+unsigned_long LINUX_MIB_TCPKEEPALIVE write_mostly - tcp_keepalive_timer
+unsigned_long LINUX_MIB_DELAYEDACKS write_mostly - tcp_delack_timer_handler,tcp_delack_timer
+unsigned_long LINUX_MIB_DELAYEDACKLOCKED write_mostly - tcp_delack_timer_handler,tcp_delack_timer
+unsigned_long LINUX_MIB_TCPAUTOCORKING write_mostly - tcp_push,tcp_sendmsg_locked
+unsigned_long LINUX_MIB_TCPFROMZEROWINDOWADV write_mostly - tcp_select_window,tcp_transmit-skb
+unsigned_long LINUX_MIB_TCPTOZEROWINDOWADV write_mostly - tcp_select_window,tcp_transmit-skb
+unsigned_long LINUX_MIB_TCPWANTZEROWINDOWADV write_mostly - tcp_select_window,tcp_transmit-skb
+unsigned_long LINUX_MIB_TCPORIGDATASENT write_mostly - tcp_write_xmit
+unsigned_long LINUX_MIB_TCPHPHITS - write_mostly tcp_rcv_established,tcp_v4_do_rcv,tcp_v6_do_rcv
+unsigned_long LINUX_MIB_TCPRCVCOALESCE - write_mostly tcp_try_coalesce,tcp_queue_rcv,tcp_rcv_established
+unsigned_long LINUX_MIB_TCPPUREACKS - write_mostly tcp_ack,tcp_rcv_established
+unsigned_long LINUX_MIB_TCPHPACKS - write_mostly tcp_ack,tcp_rcv_established
+unsigned_long LINUX_MIB_TCPDELIVERED - write_mostly tcp_newly_delivered,tcp_ack,tcp_rcv_established
+unsigned_long LINUX_MIB_SYNCOOKIESSENT
+unsigned_long LINUX_MIB_SYNCOOKIESRECV
+unsigned_long LINUX_MIB_SYNCOOKIESFAILED
+unsigned_long LINUX_MIB_EMBRYONICRSTS
+unsigned_long LINUX_MIB_PRUNECALLED
+unsigned_long LINUX_MIB_RCVPRUNED
+unsigned_long LINUX_MIB_OFOPRUNED
+unsigned_long LINUX_MIB_OUTOFWINDOWICMPS
+unsigned_long LINUX_MIB_LOCKDROPPEDICMPS
+unsigned_long LINUX_MIB_ARPFILTER
+unsigned_long LINUX_MIB_TIMEWAITED
+unsigned_long LINUX_MIB_TIMEWAITRECYCLED
+unsigned_long LINUX_MIB_TIMEWAITKILLED
+unsigned_long LINUX_MIB_PAWSACTIVEREJECTED
+unsigned_long LINUX_MIB_PAWSESTABREJECTED
+unsigned_long LINUX_MIB_DELAYEDACKLOST
+unsigned_long LINUX_MIB_LISTENOVERFLOWS
+unsigned_long LINUX_MIB_LISTENDROPS
+unsigned_long LINUX_MIB_TCPRENORECOVERY
+unsigned_long LINUX_MIB_TCPSACKRECOVERY
+unsigned_long LINUX_MIB_TCPSACKRENEGING
+unsigned_long LINUX_MIB_TCPSACKREORDER
+unsigned_long LINUX_MIB_TCPRENOREORDER
+unsigned_long LINUX_MIB_TCPTSREORDER
+unsigned_long LINUX_MIB_TCPFULLUNDO
+unsigned_long LINUX_MIB_TCPPARTIALUNDO
+unsigned_long LINUX_MIB_TCPDSACKUNDO
+unsigned_long LINUX_MIB_TCPLOSSUNDO
+unsigned_long LINUX_MIB_TCPLOSTRETRANSMIT
+unsigned_long LINUX_MIB_TCPRENOFAILURES
+unsigned_long LINUX_MIB_TCPSACKFAILURES
+unsigned_long LINUX_MIB_TCPLOSSFAILURES
+unsigned_long LINUX_MIB_TCPFASTRETRANS
+unsigned_long LINUX_MIB_TCPSLOWSTARTRETRANS
+unsigned_long LINUX_MIB_TCPTIMEOUTS
+unsigned_long LINUX_MIB_TCPLOSSPROBES
+unsigned_long LINUX_MIB_TCPLOSSPROBERECOVERY
+unsigned_long LINUX_MIB_TCPRENORECOVERYFAIL
+unsigned_long LINUX_MIB_TCPSACKRECOVERYFAIL
+unsigned_long LINUX_MIB_TCPRCVCOLLAPSED
+unsigned_long LINUX_MIB_TCPDSACKOLDSENT
+unsigned_long LINUX_MIB_TCPDSACKOFOSENT
+unsigned_long LINUX_MIB_TCPDSACKRECV
+unsigned_long LINUX_MIB_TCPDSACKOFORECV
+unsigned_long LINUX_MIB_TCPABORTONDATA
+unsigned_long LINUX_MIB_TCPABORTONCLOSE
+unsigned_long LINUX_MIB_TCPABORTONMEMORY
+unsigned_long LINUX_MIB_TCPABORTONTIMEOUT
+unsigned_long LINUX_MIB_TCPABORTONLINGER
+unsigned_long LINUX_MIB_TCPABORTFAILED
+unsigned_long LINUX_MIB_TCPMEMORYPRESSURES
+unsigned_long LINUX_MIB_TCPMEMORYPRESSURESCHRONO
+unsigned_long LINUX_MIB_TCPSACKDISCARD
+unsigned_long LINUX_MIB_TCPDSACKIGNOREDOLD
+unsigned_long LINUX_MIB_TCPDSACKIGNOREDNOUNDO
+unsigned_long LINUX_MIB_TCPSPURIOUSRTOS
+unsigned_long LINUX_MIB_TCPMD5NOTFOUND
+unsigned_long LINUX_MIB_TCPMD5UNEXPECTED
+unsigned_long LINUX_MIB_TCPMD5FAILURE
+unsigned_long LINUX_MIB_SACKSHIFTED
+unsigned_long LINUX_MIB_SACKMERGED
+unsigned_long LINUX_MIB_SACKSHIFTFALLBACK
+unsigned_long LINUX_MIB_TCPBACKLOGDROP
+unsigned_long LINUX_MIB_PFMEMALLOCDROP
+unsigned_long LINUX_MIB_TCPMINTTLDROP
+unsigned_long LINUX_MIB_TCPDEFERACCEPTDROP
+unsigned_long LINUX_MIB_IPRPFILTER
+unsigned_long LINUX_MIB_TCPTIMEWAITOVERFLOW
+unsigned_long LINUX_MIB_TCPREQQFULLDOCOOKIES
+unsigned_long LINUX_MIB_TCPREQQFULLDROP
+unsigned_long LINUX_MIB_TCPRETRANSFAIL
+unsigned_long LINUX_MIB_TCPBACKLOGCOALESCE
+unsigned_long LINUX_MIB_TCPOFOQUEUE
+unsigned_long LINUX_MIB_TCPOFODROP
+unsigned_long LINUX_MIB_TCPOFOMERGE
+unsigned_long LINUX_MIB_TCPCHALLENGEACK
+unsigned_long LINUX_MIB_TCPSYNCHALLENGE
+unsigned_long LINUX_MIB_TCPFASTOPENACTIVE
+unsigned_long LINUX_MIB_TCPFASTOPENACTIVEFAIL
+unsigned_long LINUX_MIB_TCPFASTOPENPASSIVE
+unsigned_long LINUX_MIB_TCPFASTOPENPASSIVEFAIL
+unsigned_long LINUX_MIB_TCPFASTOPENLISTENOVERFLOW
+unsigned_long LINUX_MIB_TCPFASTOPENCOOKIEREQD
+unsigned_long LINUX_MIB_TCPFASTOPENBLACKHOLE
+unsigned_long LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES
+unsigned_long LINUX_MIB_BUSYPOLLRXPACKETS
+unsigned_long LINUX_MIB_TCPSYNRETRANS
+unsigned_long LINUX_MIB_TCPHYSTARTTRAINDETECT
+unsigned_long LINUX_MIB_TCPHYSTARTTRAINCWND
+unsigned_long LINUX_MIB_TCPHYSTARTDELAYDETECT
+unsigned_long LINUX_MIB_TCPHYSTARTDELAYCWND
+unsigned_long LINUX_MIB_TCPACKSKIPPEDSYNRECV
+unsigned_long LINUX_MIB_TCPACKSKIPPEDPAWS
+unsigned_long LINUX_MIB_TCPACKSKIPPEDSEQ
+unsigned_long LINUX_MIB_TCPACKSKIPPEDFINWAIT2
+unsigned_long LINUX_MIB_TCPACKSKIPPEDTIMEWAIT
+unsigned_long LINUX_MIB_TCPACKSKIPPEDCHALLENGE
+unsigned_long LINUX_MIB_TCPWINPROBE
+unsigned_long LINUX_MIB_TCPMTUPFAIL
+unsigned_long LINUX_MIB_TCPMTUPSUCCESS
+unsigned_long LINUX_MIB_TCPDELIVEREDCE
+unsigned_long LINUX_MIB_TCPACKCOMPRESSED
+unsigned_long LINUX_MIB_TCPZEROWINDOWDROP
+unsigned_long LINUX_MIB_TCPRCVQDROP
+unsigned_long LINUX_MIB_TCPWQUEUETOOBIG
+unsigned_long LINUX_MIB_TCPFASTOPENPASSIVEALTKEY
+unsigned_long LINUX_MIB_TCPTIMEOUTREHASH
+unsigned_long LINUX_MIB_TCPDUPLICATEDATAREHASH
+unsigned_long LINUX_MIB_TCPDSACKRECVSEGS
+unsigned_long LINUX_MIB_TCPDSACKIGNOREDDUBIOUS
+unsigned_long LINUX_MIB_TCPMIGRATEREQSUCCESS
+unsigned_long LINUX_MIB_TCPMIGRATEREQFAILURE
+unsigned_long __LINUX_MIB_MAX
--- /dev/null
+++ b/Documentation/networking/net_cachelines/tcp_sock.rst
@@ -0,0 +1,156 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. Copyright (C) 2023 Google LLC
+=========================================
+tcp_sock struct fast path usage breakdown
+=========================================
+
+Type Name fastpath_tx_access fastpath_rx_access Comments
+..struct ..tcp_sock
+struct_inet_connection_sock inet_conn
+u16 tcp_header_len read_mostly read_mostly tcp_bound_to_half_wnd,tcp_current_mss(tx);tcp_rcv_established(rx)
+u16 gso_segs read_mostly - tcp_xmit_size_goal
+__be32 pred_flags read_write read_mostly tcp_select_window(tx);tcp_rcv_established(rx)
+u64 bytes_received - read_write tcp_rcv_nxt_update(rx)
+u32 segs_in - read_write tcp_v6_rcv(rx)
+u32 data_segs_in - read_write tcp_v6_rcv(rx)
+u32 rcv_nxt read_mostly read_write tcp_cleanup_rbuf,tcp_send_ack,tcp_inq_hint,tcp_transmit_skb,tcp_receive_window(tx);tcp_v6_do_rcv,tcp_rcv_established,tcp_data_queue,tcp_receive_window,tcp_rcv_nxt_update(write)(rx)
+u32 copied_seq - read_mostly tcp_cleanup_rbuf,tcp_rcv_space_adjust,tcp_inq_hint
+u32 rcv_wup - read_write __tcp_cleanup_rbuf,tcp_receive_window,tcp_receive_established
+u32 snd_nxt read_write read_mostly tcp_rate_check_app_limited,__tcp_transmit_skb,tcp_event_new_data_sent(write)(tx);tcp_rcv_established,tcp_ack,tcp_clean_rtx_queue(rx)
+u32 segs_out read_write - __tcp_transmit_skb
+u32 data_segs_out read_write - __tcp_transmit_skb,tcp_update_skb_after_send
+u64 bytes_sent read_write - __tcp_transmit_skb
+u64 bytes_acked - read_write tcp_snd_una_update/tcp_ack
+u32 dsack_dups
+u32 snd_una read_mostly read_write tcp_wnd_end,tcp_urg_mode,tcp_minshall_check,tcp_cwnd_validate(tx);tcp_ack,tcp_may_update_window,tcp_clean_rtx_queue(write),tcp_ack_tstamp(rx)
+u32 snd_sml read_write - tcp_minshall_check,tcp_minshall_update
+u32 rcv_tstamp - read_mostly tcp_ack
+u32 lsndtime read_write - tcp_slow_start_after_idle_check,tcp_event_data_sent
+u32 last_oow_ack_time
+u32 compressed_ack_rcv_nxt
+u32 tsoffset read_mostly read_mostly tcp_established_options(tx);tcp_fast_parse_options(rx)
+struct_list_head tsq_node - -
+struct_list_head tsorted_sent_queue read_write - tcp_update_skb_after_send
+u32 snd_wl1 - read_mostly tcp_may_update_window
+u32 snd_wnd read_mostly read_mostly tcp_wnd_end,tcp_tso_should_defer(tx);tcp_fast_path_on(rx)
+u32 max_window read_mostly - tcp_bound_to_half_wnd,forced_push
+u32 mss_cache read_mostly read_mostly tcp_rate_check_app_limited,tcp_current_mss,tcp_sync_mss,tcp_sndbuf_expand,tcp_tso_should_defer(tx);tcp_update_pacing_rate,tcp_clean_rtx_queue(rx)
+u32 window_clamp read_mostly read_write tcp_rcv_space_adjust,__tcp_select_window
+u32 rcv_ssthresh read_mostly - __tcp_select_window
+u82 scaling_ratio
+struct tcp_rack
+u16 advmss - read_mostly tcp_rcv_space_adjust
+u8 compressed_ack
+u8:2 dup_ack_counter
+u8:1 tlp_retrans
+u8:1 tcp_usec_ts
+u32 chrono_start read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data)
+u32[3] chrono_stat read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data)
+u8:2 chrono_type read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data)
+u8:1 rate_app_limited - read_write tcp_rate_gen
+u8:1 fastopen_connect
+u8:1 fastopen_no_cookie
+u8:1 is_sack_reneg - read_mostly tcp_skb_entail,tcp_ack
+u8:2 fastopen_client_fail
+u8:4 nonagle read_write - tcp_skb_entail,tcp_push_pending_frames
+u8:1 thin_lto
+u8:1 recvmsg_inq
+u8:1 repair read_mostly - tcp_write_xmit
+u8:1 frto
+u8 repair_queue - -
+u8:2 save_syn
+u8:1 syn_data
+u8:1 syn_fastopen
+u8:1 syn_fastopen_exp
+u8:1 syn_fastopen_ch
+u8:1 syn_data_acked
+u8:1 is_cwnd_limited read_mostly - tcp_cwnd_validate,tcp_is_cwnd_limited
+u32 tlp_high_seq - read_mostly tcp_ack
+u32 tcp_tx_delay
+u64 tcp_wstamp_ns read_write - tcp_pacing_check,tcp_tso_should_defer,tcp_update_skb_after_send
+u64 tcp_clock_cache read_write read_write tcp_mstamp_refresh(tcp_write_xmit/tcp_rcv_space_adjust),__tcp_transmit_skb,tcp_tso_should_defer;timer
+u64 tcp_mstamp read_write read_write tcp_mstamp_refresh(tcp_write_xmit/tcp_rcv_space_adjust)(tx);tcp_rcv_space_adjust,tcp_rate_gen,tcp_clean_rtx_queue,tcp_ack_update_rtt/tcp_time_stamp(rx);timer
+u32 srtt_us read_mostly read_write tcp_tso_should_defer(tx);tcp_update_pacing_rate,__tcp_set_rto,tcp_rtt_estimator(rx)
+u32 mdev_us read_write - tcp_rtt_estimator
+u32 mdev_max_us
+u32 rttvar_us - read_mostly __tcp_set_rto
+u32 rtt_seq read_write tcp_rtt_estimator
+struct_minmax rtt_min - read_mostly tcp_min_rtt/tcp_rate_gen,tcp_min_rtttcp_update_rtt_min
+u32 packets_out read_write read_write tcp_packets_in_flight(tx/rx);tcp_slow_start_after_idle_check,tcp_nagle_check,tcp_rate_skb_sent,tcp_event_new_data_sent,tcp_cwnd_validate,tcp_write_xmit(tx);tcp_ack,tcp_clean_rtx_queue,tcp_update_pacing_rate(rx)
+u32 retrans_out - read_mostly tcp_packets_in_flight,tcp_rate_check_app_limited
+u32 max_packets_out - read_write tcp_cwnd_validate
+u32 cwnd_usage_seq - read_write tcp_cwnd_validate
+u16 urg_data - read_mostly tcp_fast_path_check
+u8 ecn_flags read_write - tcp_ecn_send
+u8 keepalive_probes
+u32 reordering read_mostly - tcp_sndbuf_expand
+u32 reord_seen
+u32 snd_up read_write read_mostly tcp_mark_urg,tcp_urg_mode,__tcp_transmit_skb(tx);tcp_clean_rtx_queue(rx)
+struct_tcp_options_received rx_opt read_mostly read_write tcp_established_options(tx);tcp_fast_path_on,tcp_ack_update_window,tcp_is_sack,tcp_data_queue,tcp_rcv_established,tcp_ack_update_rtt(rx)
+u32 snd_ssthresh - read_mostly tcp_update_pacing_rate
+u32 snd_cwnd read_mostly read_mostly tcp_snd_cwnd,tcp_rate_check_app_limited,tcp_tso_should_defer(tx);tcp_update_pacing_rate
+u32 snd_cwnd_cnt
+u32 snd_cwnd_clamp
+u32 snd_cwnd_used
+u32 snd_cwnd_stamp
+u32 prior_cwnd
+u32 prr_delivered
+u32 prr_out read_mostly read_mostly tcp_rate_skb_sent,tcp_newly_delivered(tx);tcp_ack,tcp_rate_gen,tcp_clean_rtx_queue(rx)
+u32 delivered read_mostly read_write tcp_rate_skb_sent, tcp_newly_delivered(tx);tcp_ack, tcp_rate_gen, tcp_clean_rtx_queue (rx)
+u32 delivered_ce read_mostly read_write tcp_rate_skb_sent(tx);tcp_rate_gen(rx)
+u32 lost - read_mostly tcp_ack
+u32 app_limited read_write read_mostly tcp_rate_check_app_limited,tcp_rate_skb_sent(tx);tcp_rate_gen(rx)
+u64 first_tx_mstamp read_write - tcp_rate_skb_sent
+u64 delivered_mstamp read_write - tcp_rate_skb_sent
+u32 rate_delivered - read_mostly tcp_rate_gen
+u32 rate_interval_us - read_mostly rate_delivered,rate_app_limited
+u32 rcv_wnd read_write read_mostly tcp_select_window,tcp_receive_window,tcp_fast_path_check
+u32 write_seq read_write - tcp_rate_check_app_limited,tcp_write_queue_empty,tcp_skb_entail,forced_push,tcp_mark_push
+u32 notsent_lowat read_mostly - tcp_stream_memory_free
+u32 pushed_seq read_write - tcp_mark_push,forced_push
+u32 lost_out read_mostly read_mostly tcp_left_out(tx);tcp_packets_in_flight(tx/rx);tcp_rate_check_app_limited(rx)
+u32 sacked_out read_mostly read_mostly tcp_left_out(tx);tcp_packets_in_flight(tx/rx);tcp_clean_rtx_queue(rx)
+struct_hrtimer pacing_timer
+struct_hrtimer compressed_ack_timer
+struct_sk_buff* lost_skb_hint read_mostly tcp_clean_rtx_queue
+struct_sk_buff* retransmit_skb_hint read_mostly - tcp_clean_rtx_queue
+struct_rb_root out_of_order_queue - read_mostly tcp_data_queue,tcp_fast_path_check
+struct_sk_buff* ooo_last_skb
+struct_tcp_sack_block[1] duplicate_sack
+struct_tcp_sack_block[4] selective_acks
+struct_tcp_sack_block[4] recv_sack_cache
+struct_sk_buff* highest_sack read_write - tcp_event_new_data_sent
+int lost_cnt_hint
+u32 prior_ssthresh
+u32 high_seq
+u32 retrans_stamp
+u32 undo_marker
+int undo_retrans
+u64 bytes_retrans
+u32 total_retrans
+u32 rto_stamp
+u16 total_rto
+u16 total_rto_recoveries
+u32 total_rto_time
+u32 urg_seq - -
+unsigned_int keepalive_time
+unsigned_int keepalive_intvl
+int linger2
+u8 bpf_sock_ops_cb_flags
+u8:1 bpf_chg_cc_inprogress
+u16 timeout_rehash
+u32 rcv_ooopack
+u32 rcv_rtt_last_tsecr
+struct rcv_rtt_est - read_write tcp_rcv_space_adjust,tcp_rcv_established
+struct rcvq_space - read_write tcp_rcv_space_adjust
+struct mtu_probe
+u32 plb_rehash
+u32 mtu_info
+bool is_mptcp
+bool smc_hs_congested
+bool syn_smc
+struct_tcp_sock_af_ops* af_specific
+struct_tcp_md5sig_info* md5sig_info
+struct_tcp_fastopen_request* fastopen_req
+struct_request_sock* fastopen_rsk
+struct_saved_syn* saved_syn
\ No newline at end of file
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14613,6 +14613,7 @@ Q: https://patchwork.kernel.org/project/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git
F: Documentation/devicetree/bindings/net/
+F: Documentation/networking/net_cachelines/net_device.rst
F: drivers/connector/
F: drivers/net/
X: drivers/net/wireless/
@@ -14667,6 +14668,7 @@ T: git git://git.kernel.org/pub/scm/linu
F: Documentation/core-api/netlink.rst
F: Documentation/netlink/
F: Documentation/networking/
+F: Documentation/networking/net_cachelines/
F: Documentation/process/maintainer-netdev.rst
F: Documentation/userspace-api/netlink/
F: include/linux/in.h
@@ -14763,6 +14765,7 @@ NETWORKING [TCP]
M: Eric Dumazet <edumazet@google.com>
L: netdev@vger.kernel.org
S: Maintained
+F: Documentation/networking/net_cachelines/tcp_sock.rst
F: include/linux/tcp.h
F: include/net/tcp.h
F: include/trace/events/tcp.h