Eric Dumazet fa76ce7328 inet: get rid of central tcp/dccp listener timer ... One of the major issue for TCP is the SYNACK rtx handling, done by inet_csk_reqsk_queue_prune(), fired by the keepalive timer of a TCP_LISTEN socket. This function runs for awful long times, with socket lock held, meaning that other cpus needing this lock have to spin for hundred of ms. SYNACK are sent in huge bursts, likely to cause severe drops anyway. This model was OK 15 years ago when memory was very tight. We now can afford to have a timer per request sock. Timer invocations no longer need to lock the listener, and can be run from all cpus in parallel. With following patch increasing somaxconn width to 32 bits, I tested a listener with more than 4 million active request sockets, and a steady SYNFLOOD of ~200,000 SYN per second. Host was sending ~830,000 SYNACK per second. This is ~100 times more what we could achieve before this patch. Later, we will get rid of the listener hash and use ehash instead. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-03-20 12:40:25 -04:00
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netfilter	netfilter: fix sparse warnings in reject handling	2015-03-10 15:01:32 +01:00
Kconfig	…
Makefile	…
af_inet.c	net: Remove iocb argument from sendmsg and recvmsg	2015-03-02 13:06:31 -05:00
ah4.c	…
arp.c	neigh: Factor out ___neigh_lookup_noref	2015-03-04 00:23:23 -05:00
cipso_ipv4.c	cipso: don't use IPCB() to locate the CIPSO IP option	2015-02-11 14:46:37 -05:00
datagram.c	…
devinet.c	ipv4, ipv6: kill ip_mc_{join, leave}_group and ipv6_sock_mc_{join, drop}	2015-03-18 22:05:09 -04:00
esp4.c	…
fib_frontend.c	fib_trie: Avoid NULL pointer if local table is not allocated	2015-03-12 18:26:51 -04:00
fib_lookup.h	ipv4: FIB Local/MAIN table collapse	2015-03-11 16:22:14 -04:00
fib_rules.c	ipv4: FIB Local/MAIN table collapse	2015-03-11 16:22:14 -04:00
fib_semantics.c	net: Kill hold_net release_net	2015-03-12 14:39:40 -04:00
fib_trie.c	fib_trie: Provide a deterministic order for fib_alias w/ tables merged	2015-03-12 18:26:51 -04:00
fou.c	gue: Use checksum partial with remote checksum offload	2015-02-11 15:12:13 -08:00
geneve.c	…
gre_demux.c	…
gre_offload.c	…
icmp.c	ipv4: icmp: use percpu allocation	2015-01-31 17:48:18 -08:00
igmp.c	ipv4, ipv6: kill ip_mc_{join, leave}_group and ipv6_sock_mc_{join, drop}	2015-03-18 22:05:09 -04:00
inet_connection_sock.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
inet_diag.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
inet_fragment.c	…
inet_hashtables.c	inet: get rid of last __inet_hash_connect() argument	2015-03-18 22:00:35 -04:00
inet_lro.c	…
inet_timewait_sock.c	inet: add a schedule point in inet_twsk_purge()	2015-03-18 22:38:13 -04:00
inetpeer.c	…
ip_forward.c	…
ip_fragment.c	ipv4: ip_check_defrag should not assume that skb_network_offset is zero	2015-03-05 21:43:48 -05:00
ip_gre.c	gre/ipip: use be16 variants of netlink functions	2015-02-08 16:28:06 -08:00
ip_input.c	…
ip_options.c	…
ip_output.c	udp: only allow UFO for packets from SOCK_DGRAM sockets	2015-03-02 22:19:29 -05:00
ip_sockglue.c	ipv4, ipv6: kill ip_mc_{join, leave}_group and ipv6_sock_mc_{join, drop}	2015-03-18 22:05:09 -04:00
ip_tunnel.c	…
ip_tunnel_core.c	…
ip_vti.c	…
ipcomp.c	…
ipconfig.c	…
ipip.c	gre/ipip: use be16 variants of netlink functions	2015-02-08 16:28:06 -08:00
ipmr.c	net: Introduce possible_net_t	2015-03-12 14:39:40 -04:00
netfilter.c	…
ping.c	netns: constify net_hash_mix() and various callers	2015-03-18 22:00:34 -04:00
proc.c	tcp: helpers to mitigate ACK loops by rate-limiting out-of-window dupacks	2015-02-08 01:03:12 -08:00
protocol.c	…
raw.c	net: Remove iocb argument from sendmsg and recvmsg	2015-03-02 13:06:31 -05:00
route.c	net: Remove protocol from struct dst_ops	2015-03-09 16:06:10 -04:00
syncookies.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
sysctl_net_ipv4.c	ipv4: Create probe timer for tcp PMTU as per RFC4821	2015-03-06 14:57:42 -05:00
tcp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-03-09 23:38:02 -04:00
tcp_bic.c	…
tcp_cong.c	tcp: silence registration message	2015-02-20 15:04:03 -05:00
tcp_cubic.c	…
tcp_dctcp.c	…
tcp_diag.c	inet_diag: add const to inet_diag_req_v2	2015-03-10 13:45:28 -04:00
tcp_fastopen.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
tcp_highspeed.c	…
tcp_htcp.c	…
tcp_hybla.c	…
tcp_illinois.c	…
tcp_input.c	inet: drop prev pointer handling in request sock	2015-03-20 12:40:25 -04:00
tcp_ipv4.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
tcp_lp.c	…
tcp_memcontrol.c	memcg: cleanup static keys decrement	2015-02-12 18:54:10 -08:00
tcp_metrics.c	tcp_metrics: fix wrong lockdep annotations	2015-03-16 16:32:23 -04:00
tcp_minisocks.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
tcp_offload.c	tcp: cleanup static functions	2015-02-28 16:56:51 -05:00
tcp_output.c	ipv4: Create probe timer for tcp PMTU as per RFC4821	2015-03-06 14:57:42 -05:00
tcp_probe.c	…
tcp_scalable.c	…
tcp_timer.c	inet: get rid of central tcp/dccp listener timer	2015-03-20 12:40:25 -04:00
tcp_vegas.c	…
tcp_vegas.h	…
tcp_veno.c	…
tcp_westwood.c	…
tcp_yeah.c	…
tunnel4.c	…
udp.c	netns: constify net_hash_mix() and various callers	2015-03-18 22:00:34 -04:00
udp_diag.c	inet_diag: add const to inet_diag_req_v2	2015-03-10 13:45:28 -04:00
udp_impl.h	net: Remove iocb argument from sendmsg and recvmsg	2015-03-02 13:06:31 -05:00
udp_offload.c	udp: Set SKB_GSO_UDP_TUNNEL* in UDP GRO path	2015-02-11 15:12:10 -08:00
udp_tunnel.c	…
udplite.c	…
xfrm4_input.c	…
xfrm4_mode_beet.c	…
xfrm4_mode_transport.c	…
xfrm4_mode_tunnel.c	…
xfrm4_output.c	…
xfrm4_policy.c	net: Remove protocol from struct dst_ops	2015-03-09 16:06:10 -04:00
xfrm4_protocol.c	…
xfrm4_state.c	…
xfrm4_tunnel.c	…