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b3d051477c
kernel_optimize_test/net/ipv6
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Eric Dumazet b3d051477c tcp: do not mess with listener sk_wmem_alloc 
When removing sk_refcnt manipulation on synflood, I missed that
using skb_set_owner_w() was racy, if sk->sk_wmem_alloc had already
transitioned to 0.

We should hold sk_refcnt instead, but this is a big deal under attack.
(Doing so increase performance from 3.2 Mpps to 3.8 Mpps only)

In this patch, I chose to not attach a socket to syncookies skb.

Performance is now 5 Mpps instead of 3.2 Mpps.

Following patch will remove last known false sharing in
tcp_rcv_state_process()

Fixes: 3b24d854cb ("tcp/dccp: do not touch listener sk_refcnt under synflood")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-15 16:45:44 -04:00
..
ila rhashtable: accept GFP flags in rhashtable_walk_init 2016-04-05 10:56:32 +02:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-04-12 22:34:56 -04:00
addrconf_core.c
addrconf.c ipv6, token: allow for clearing the current device token 2016-04-13 22:38:14 -04:00
addrlabel.c ipv6/addrlabel: fix ip6addrlbl_get() 2015-12-22 15:57:54 -05:00
af_inet6.c udp: Add GRO functions to UDP socket 2016-04-07 16:53:29 -04:00
ah6.c
anycast.c
datagram.c ipv6: process socket-level control messages in IPv6 2016-04-04 15:50:30 -04:00
esp6.c
exthdrs_core.c ipv6: re-enable fragment header matching in ipv6_find_hdr 2016-03-03 16:35:20 -05:00
exthdrs_offload.c
exthdrs.c ipv6: add complete rcu protection around np->opt 2015-12-02 23:37:16 -05:00
fib6_rules.c ipv6: fix the incorrect return value of throw route 2015-10-23 02:38:18 -07:00
icmp.c sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
inet6_connection_sock.c soreuseport: fast reuseport TCP socket selection 2016-02-11 03:54:15 -05:00
inet6_hashtables.c ipv6: fix inet6_lookup_listener() 2016-04-09 16:53:52 -04:00
ip6_checksum.c ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short 2016-03-13 23:55:13 -04:00
ip6_fib.c ipv6: per netns FIB garbage collection 2016-03-08 15:16:51 -05:00
ip6_flowlabel.c ipv6: process socket-level control messages in IPv6 2016-04-04 15:50:30 -04:00
ip6_gre.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-03-08 12:34:12 -05:00
ip6_icmp.c
ip6_input.c ipv4: namespacify ip_early_demux sysctl knob 2016-02-16 20:42:54 -05:00
ip6_offload.c GSO: Support partial segmentation offload 2016-04-14 16:23:41 -04:00
ip6_offload.h udp: Add GRO functions to UDP socket 2016-04-07 16:53:29 -04:00
ip6_output.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-09 17:41:41 -04:00
ip6_tunnel.c ip6_tunnel: set rtnl_link_ops before calling register_netdevice 2016-04-05 19:48:51 -04:00
ip6_udp_tunnel.c ip_tunnel: add support for setting flow label via collect metadata 2016-03-11 15:14:26 -05:00
ip6_vti.c net: replace dst_cache ip6_tunnel implementation with the generic one 2016-02-16 20:21:48 -05:00
ip6mr.c net: ipmr, ip6mr: fix vif/tunnel failure race condition 2015-11-24 17:15:56 -05:00
ipcomp6.c
ipv6_sockglue.c net: introduce lockdep_is_held and update various places to use it 2016-04-07 16:44:14 -04:00
Kconfig net: replace dst_cache ip6_tunnel implementation with the generic one 2016-02-16 20:21:48 -05:00
Makefile udp: Add GRO functions to UDP socket 2016-04-07 16:53:29 -04:00
mcast_snoop.c
mcast.c mld, igmp: Fix reserved tailroom calculation 2016-03-03 15:41:07 -05:00
mip6.c ipv6: use ktime_t for internal timestamps 2015-10-05 03:16:47 -07:00
ndisc.c ipv6: add option to drop unsolicited neighbor advertisements 2016-02-11 04:27:36 -05:00
netfilter.c ipv6: Pass struct net into ip6_route_me_harder 2015-09-29 20:21:32 +02:00
output_core.c ipv4, ipv6: Pass net into ip_local_out and ip6_local_out 2015-10-08 04:27:02 -07:00
ping.c sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
proc.c
protocol.c
raw.c sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
reassembly.c net: use skb_postpush_rcsum instead of own implementations 2016-02-19 23:43:10 -05:00
route.c ipv6: enforce flowi6_oif usage in ip6_dst_lookup_tail() 2016-01-29 20:31:26 -08:00
sit.c tunnels: Remove encapsulation offloads on decap. 2016-03-20 16:33:40 -04:00
syncookies.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
sysctl_net_ipv6.c
tcp_ipv6.c tcp: do not mess with listener sk_wmem_alloc 2016-04-15 16:45:44 -04:00
tcpv6_offload.c
tunnel6.c ipv6: fix tunnel error handling 2015-11-03 10:52:13 -05:00
udp_impl.h
udp_offload.c udp: Add GRO functions to UDP socket 2016-04-07 16:53:29 -04:00
udp.c udp: Add udp6_lib_lookup_skb and udp4_lib_lookup_skb 2016-04-07 16:53:14 -04:00
udplite.c
xfrm6_input.c netfilter: Pass struct net into the netfilter hooks 2015-09-17 17:18:37 -07:00
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c ipv6: update skb->csum when CE mark is propagated 2016-01-15 15:07:23 -05:00
xfrm6_output.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
xfrm6_policy.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2015-12-22 16:26:31 -05:00
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c