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linux/net/ipv4
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Eric Dumazet e11ecddf51 tcp: use TCP_SKB_CB(skb)->tcp_flags in input path 
Input path of TCP do not currently uses TCP_SKB_CB(skb)->tcp_flags,
which is only used in output path.

tcp_recvmsg(), looks at tcp_hdr(skb)->syn for every skb found in receive queue,
and its unfortunate because this bit is located in a cache line right before
the payload.

We can simplify TCP by copying tcp flags into TCP_SKB_CB(skb)->tcp_flags.

This patch does so, and avoids the cache line miss in tcp_recvmsg()

Following patches will
- allow a segment with FIN being coalesced in tcp_try_coalesce()
- simplify tcp_collapse() by not copying the headers.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15 14:41:07 -04:00
..
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
2014-09-10 12:46:32 -07:00
af_inet.c
ipip: Add gro callbacks to ipip offload
2014-09-09 21:29:33 -07:00
ah4.c
ah4: Use the IPsec protocol multiplexer API
2014-02-25 07:04:17 +01:00
arp.c
ipv4: arp: update neighbour address when a gratuitous arp is received and arp_accept is set
2014-01-02 00:08:38 -05:00
cipso_ipv4.c
netlabel: shorter names for the NetLabel catmap funcs/structs
2014-08-01 11:17:37 -04:00
datagram.c
net: Save TX flow hash in sock and set in skbuf on xmit
2014-07-07 21:14:21 -07:00
devinet.c
ipv4: fail early when creating netdev named all or default
2014-07-29 11:43:50 -07:00
esp4.c
esp4: Use the IPsec protocol multiplexer API
2014-02-25 07:04:17 +01:00
fib_frontend.c
ipv4: Restore accept_local behaviour in fib_validate_source()
2014-08-22 12:23:10 -07:00
fib_lookup.h
ipv4: make fib_detect_death static
2013-12-28 17:01:46 -05:00
fib_rules.c
inet: fix NULL pointer Oops in fib(6)_rule_suppress
2013-12-10 17:54:23 -05:00
fib_semantics.c
ipv4: fix a race in update_or_create_fnhe()
2014-09-05 17:15:50 -07:00
fib_trie.c
list: fix order of arguments for hlist_add_after(_rcu)
2014-08-06 18:01:24 -07:00
gre_demux.c
net: Fix GRE RX to use skb_transport_header for GRE header offset
2014-09-08 15:23:05 -07:00
gre_offload.c
gre: Add support for checksum unnecessary conversions
2014-09-01 21:36:28 -07:00
icmp.c
ipv4: remove nested rcu_read_lock/unlock
2014-08-02 15:27:35 -07:00
igmp.c
ipv4: implement igmp_qrv sysctl to tune igmp robustness variable
2014-09-04 22:26:14 -07:00
inet_connection_sock.c
ipv4: make ip_local_reserved_ports per netns
2014-05-14 15:31:45 -04:00
inet_diag.c
inet_diag: fix inet_diag_dump_icsk() to use correct state for timewait sockets
2014-01-13 22:35:46 -08:00
inet_fragment.c
inet: frags: use kmem_cache for inet_frag_queue
2014-08-02 15:31:31 -07:00
inet_hashtables.c
net: use reciprocal_scale() helper
2014-08-23 12:21:21 -07:00
inet_lro.c
lro: remove dead code
2013-12-29 16:34:25 -05:00
inet_timewait_sock.c
tcp/dccp: remove twchain
2013-10-08 23:19:24 -04:00
inetpeer.c
inet: remove dead inetpeer sequence code
2014-09-08 16:42:42 -07:00
ip_forward.c
net: rename local_df to ignore_df
2014-05-12 14:03:41 -04:00
ip_fragment.c
inet: frags: use kmem_cache for inet_frag_queue
2014-08-02 15:31:31 -07:00
ip_gre.c
gre: allow changing mac address when device is up
2014-06-10 22:46:42 -07:00
ip_input.c
net: Fix memory leak if TPROXY used with TCP early demux
2014-01-27 16:22:11 -08:00
ip_options.c
ipv4: fix buffer overflow in ip_options_compile()
2014-07-21 20:16:26 -07:00
ip_output.c
net-timestamp: add key to disambiguate concurrent datagrams
2014-08-05 16:35:54 -07:00
ip_sockglue.c
ipv4: rcu cleanup in ip_ra_control()
2014-09-09 20:10:44 -07:00
ip_tunnel_core.c
net: Support for multiple checksums with gso
2014-06-04 22:46:38 -07:00
ip_tunnel.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-08-05 18:46:26 -07:00
ip_vti.c
vti: Simplify error handling in module init and exit
2014-06-26 08:21:57 +02:00
ipcomp.c
ipcomp4: Use the IPsec protocol multiplexer API
2014-02-25 07:04:17 +01:00
ipconfig.c
ipconfig: Use time_before
2014-08-22 12:23:11 -07:00
ipip.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-06-11 16:02:55 -07:00
ipmr.c
net: set name_assign_type in alloc_netdev()
2014-07-15 16:12:48 -07:00
Kconfig
udp: Add udp_sock_create for UDP tunnels to open listener socket
2014-07-14 16:12:15 -07:00
Makefile
udp: Add udp_sock_create for UDP tunnels to open listener socket
2014-07-14 16:12:15 -07:00
netfilter.c
netfilter: remove double colon
2014-02-19 11:41:25 +01:00
ping.c
net/ipv4: bind ip_nonlocal_bind to current netns
2014-09-09 11:27:09 -07:00
proc.c
inet: frag: don't account number of fragment queues
2014-07-27 22:34:36 -07:00
protocol.c
net: remove outdated comment for ipv4 and ipv6 protocol handler
2013-11-28 18:47:51 -05:00
raw.c
ipv4: Make IP_MULTICAST_ALL and IP_MSFILTER work on raw sockets
2014-07-23 15:13:26 -07:00
route.c
ipv4: harden fnhe_hashfun()
2014-09-05 17:40:33 -07:00
syncookies.c
tcp: syncookies: mark cookie_secret read_mostly
2014-08-27 16:30:49 -07:00
sysctl_net_ipv4.c
net/ipv4: bind ip_nonlocal_bind to current netns
2014-09-09 11:27:09 -07:00
tcp_bic.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_cong.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_cubic.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_diag.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_fastopen.c
tcp: remove unnecessary tcp_sk assignment.
2014-06-16 21:35:00 -07:00
tcp_highspeed.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_htcp.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_hybla.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_illinois.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_input.c
tcp: use TCP_SKB_CB(skb)->tcp_flags in input path
2014-09-15 14:41:07 -04:00
tcp_ipv4.c
tcp: use TCP_SKB_CB(skb)->tcp_flags in input path
2014-09-15 14:41:07 -04:00
tcp_lp.c
tcp: remove in_flight parameter from cong_avoid() methods
2014-05-03 19:23:07 -04:00
tcp_memcontrol.c
cgroup: replace cgroup_add_cftypes() with cgroup_add_legacy_cftypes()
2014-07-15 11:05:09 -04:00
tcp_metrics.c
tcp: don't allow syn packets without timestamps to pass tcp_tw_recycle logic
2014-08-14 14:38:54 -07:00
tcp_minisocks.c
tcp: introduce TCP_SKB_CB(skb)->tcp_tw_isn
2014-09-05 17:49:33 -07:00
tcp_offload.c
tcp: Call skb_gro_checksum_validate
2014-08-24 18:09:24 -07:00
tcp_output.c
tcp: remove obsolete comment about TCP_SKB_CB(skb)->when in tcp_fragment()
2014-09-06 12:29:10 -07:00
tcp_probe.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_scalable.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_timer.c
tcp: remove TCP_SKB_CB(skb)->when
2014-09-05 17:49:33 -07:00
tcp_vegas.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_vegas.h
net: ipv4/ipv6: Remove extern from function prototypes
2013-10-19 19:12:11 -04:00
tcp_veno.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_westwood.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp_yeah.c
tcp: whitespace fixes
2014-09-01 18:12:45 -07:00
tcp.c
tcp: use TCP_SKB_CB(skb)->tcp_flags in input path
2014-09-15 14:41:07 -04:00
tunnel4.c
net: Convert printks to pr_<level>
2012-03-11 23:42:51 -07:00
udp_diag.c
netlink: rename ssk to sk in struct netlink_skb_params
2013-04-19 14:57:56 -04:00
udp_impl.h
net: ipv4/ipv6: Remove extern from function prototypes
2013-10-19 19:12:11 -04:00
udp_offload.c
udp: Fix inverted NAPI_GRO_CB(skb)->flush test
2014-09-12 17:55:41 -04:00
udp_tunnel.c
udp: Add udp_sock_create for UDP tunnels to open listener socket
2014-07-14 16:12:15 -07:00
udp.c
net: merge cases where sock_efree and sock_edemux are the same function
2014-09-05 17:43:45 -07:00
udplite.c
net: Eliminate no_check from protosw
2014-05-23 16:28:53 -04:00
xfrm4_input.c
xfrm4: Add IPsec protocol multiplexer
2014-02-25 07:04:16 +01:00
xfrm4_mode_beet.c
ipv4: ERROR: code indent should use tabs where possible
2013-12-26 13:43:21 -05:00
xfrm4_mode_transport.c
…
xfrm4_mode_tunnel.c
inetpeer: get rid of ip_id_count
2014-06-02 11:00:41 -07:00
xfrm4_output.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-05-24 00:32:30 -04:00
xfrm4_policy.c
xfrm: Introduce xfrm_input_afinfo to access the the callbacks properly
2014-03-14 07:28:07 +01:00
xfrm4_protocol.c
xfrm4: Remove duplicate semicolon
2014-06-30 07:49:47 +02:00
xfrm4_state.c
inet: make no_pmtu_disc per namespace and kill ipv4_config
2013-12-18 16:58:20 -05:00
xfrm4_tunnel.c
sit: add IPv4 over IPv4 support
2013-05-31 17:19:05 -07:00