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c9d1d23e52
linux/net/ipv6
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Felix Fietkau c9d1d23e52 net: add heuristic for enabling TCP fraglist GRO 
When forwarding TCP after GRO, software segmentation is very expensive,
especially when the checksum needs to be recalculated.
One case where that's currently unavoidable is when routing packets over
PPPoE. Performance improves significantly when using fraglist GRO
implemented in the same way as for UDP.

When NETIF_F_GRO_FRAGLIST is enabled, perform a lookup for an established
socket in the same netns as the receiving device. While this may not
cover all relevant use cases in multi-netns configurations, it should be
good enough for most configurations that need this.

Here's a measurement of running 2 TCP streams through a MediaTek MT7622
device (2-core Cortex-A53), which runs NAT with flow offload enabled from
one ethernet port to PPPoE on another ethernet port + cake qdisc set to
1Gbps.

rx-gro-list off: 630 Mbit/s, CPU 35% idle
rx-gro-list on:  770 Mbit/s, CPU 40% idle

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2024-05-06 11:54:04 +02:00
..
ila ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
netfilter netfilter: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
addrconf_core.c ipv6: Ensure natural alignment of const ipv6 loopback and router addresses 2024-01-30 12:43:18 +01:00
addrconf.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
addrlabel.c ipv6: remove RTNL protection from ip6addrlbl_dump() 2024-04-08 11:01:05 +01:00
af_inet6.c net: introduce include/net/rps.h 2024-03-07 21:12:43 -08:00
ah6.c net: fill in MODULE_DESCRIPTION()s for ipv6 modules 2024-02-09 14:12:01 -08:00
anycast.c ipv6: anycast: use call_rcu_hurry() in aca_put() 2024-05-01 11:46:21 +01:00
calipso.c netlabel: remove impossible return value in netlbl_bitmap_walk 2024-02-28 19:37:34 -08:00
datagram.c ipv6: annotate data-races around np->ucast_oif 2023-12-11 10:59:17 +00:00
esp6_offload.c xfrm: Support GRO for IPv6 ESP in UDP encapsulation 2023-10-06 07:31:14 +02:00
esp6.c net: move skb ref helpers to new header 2024-04-11 19:29:22 -07:00
exthdrs_core.c ipv6: Fix out-of-bounds access in ipv6_find_tlv() 2023-05-24 08:43:39 +01:00
exthdrs_offload.c net: gso: add HBH extension header offload support 2024-01-05 08:11:49 -08:00
exthdrs.c net: ipv6: exthdrs: get rid of ipv6_skb_net() 2024-03-11 15:15:08 -07:00
fib6_notifier.c
fib6_rules.c ipv6: fib6_rules: flush route cache when rule is changed 2024-03-08 10:10:35 +00:00
fou6.c
icmp.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
inet6_connection_sock.c net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
inet6_hashtables.c ipv6: move tcp_ipv6_hash_secret and udp_ipv6_hash_secret to net_hotdata 2024-03-07 21:12:43 -08:00
ioam6_iptunnel.c netlink: make range pointers in policies const 2023-10-26 16:24:09 -07:00
ioam6.c ipv6/addrconf: annotate data-races around devconf fields (II) 2024-03-01 08:42:33 +00:00
ip6_checksum.c
ip6_fib.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-04-11 14:23:47 -07:00
ip6_flowlabel.c ipv6: move np->repflow to atomic flags 2023-09-15 10:33:48 +01:00
ip6_gre.c net: ip6_gre: Remove generic .ndo_get_stats64 2024-04-15 11:32:13 +01:00
ip6_icmp.c
ip6_input.c ipv6/addrconf: annotate data-races around devconf fields (II) 2024-03-01 08:42:33 +00:00
ip6_offload.c net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-02 11:02:48 +02:00
ip6_offload.h
ip6_output.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
ip6_tunnel.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
ip6_udp_tunnel.c net: fill in MODULE_DESCRIPTION()s for ipv6 modules 2024-02-09 14:12:01 -08:00
ip6_vti.c ip6_vti: fix memleak on netns dismantle 2024-04-16 17:33:59 -07:00
ip6mr.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
ipcomp6.c
ipv6_sockglue.c inet: Add getsockopt support for IP_ROUTER_ALERT and IPV6_ROUTER_ALERT 2024-03-06 12:37:06 +00:00
Kconfig ipv6: fix indentation of a config attribute 2023-08-16 10:03:08 +01:00
Makefile net/tcp: Introduce TCP_AO setsockopt()s 2023-10-27 10:35:44 +01:00
mcast_snoop.c
mcast.c ipv6/addrconf: annotate data-races around devconf fields (II) 2024-03-01 08:42:33 +00:00
mip6.c net: fill in MODULE_DESCRIPTION()s for ipv6 modules 2024-02-09 14:12:01 -08:00
ndisc.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
netfilter.c xfrm: pass struct net to xfrm_decode_session wrappers 2023-10-06 08:31:53 +02:00
output_core.c ipv6: annotate data-races around cnf.hop_limit 2024-03-01 08:42:31 +00:00
ping.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
proc.c net: fix IPSTATS_MIB_OUTPKGS increment in OutForwDatagrams. 2023-10-20 12:01:00 +01:00
protocol.c
raw.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
reassembly.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
route.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
rpl_iptunnel.c ipv6: rpl: Remove redundant skb_dst_drop(). 2023-07-12 17:12:29 -07:00
rpl.c ipv6: rpl: Remove pskb(_may)?_pull() in ipv6_rpl_srh_rcv(). 2023-06-19 11:32:58 -07:00
seg6_hmac.c ipv6/addrconf: annotate data-races around devconf fields (II) 2024-03-01 08:42:33 +00:00
seg6_iptunnel.c seg6: Cleanup duplicates of skb_dst_drop calls 2023-05-17 09:05:47 +01:00
seg6_local.c seg6: add NEXT-C-SID support for SRv6 End.X behavior 2023-08-15 18:51:47 -07:00
seg6.c ipv6: sr: fix possible use-after-free and null-ptr-deref 2024-02-20 10:17:14 +01:00
sit.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
syncookies.c tcp: annotate data-races around tp->window_clamp 2024-04-05 22:32:37 -07:00
sysctl_net_ipv6.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
tcp_ao.c net/tcp: Wire up l3index to TCP-AO 2023-10-27 10:35:46 +01:00
tcp_ipv6.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
tcpv6_offload.c net: add heuristic for enabling TCP fraglist GRO 2024-05-06 11:54:04 +02:00
tunnel6.c net: fill in MODULE_DESCRIPTION()s for ipv6 modules 2024-02-09 14:12:01 -08:00
udp_impl.h
udp_offload.c net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-02 11:02:48 +02:00
udp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-02 12:06:25 -07:00
udplite.c udplite: remove UDPLITE_BIT 2023-09-14 16:16:36 +02:00
xfrm6_input.c net: adopt skb_network_offset() and similar helpers 2024-03-04 08:47:06 +00:00
xfrm6_output.c ipv6: drop feature RTAX_FEATURE_ALLFRAG 2023-10-25 18:04:29 -07:00
xfrm6_policy.c net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c ipsec-next-2024-03-06 2024-03-08 10:56:05 +00:00