Florian Westphal 31770e34e4 tcp: Revert "tcp: remove header prediction" ...

This reverts commit 45f119bf936b1f9f546a0b139c5b56f9bb2bdc78.

Eric Dumazet says:
  We found at Google a significant regression caused by
  45f119bf936b1f9f546a0b139c5b56f9bb2bdc78 tcp: remove header prediction

  In typical RPC  (TCP_RR), when a TCP socket receives data, we now call
  tcp_ack() while we used to not call it.

  This touches enough cache lines to cause a slowdown.

so problem does not seem to be HP removal itself but the tcp_ack()
call.  Therefore, it might be possible to remove HP after all, provided
one finds a way to elide tcp_ack for most cases.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

2017-08-30 11:20:09 -07:00

..

netfilter

netfilter: nf_tables: only allow in/output for arp packets

2017-07-17 17:02:44 +02:00

af_inet.c

net: Add comment that early_demux can change via sysctl

2017-08-28 15:17:29 -07:00

ah4.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next

2017-06-23 14:17:31 -04:00

arp.c

neigh: increase queue_len_bytes to match wmem_default

2017-08-29 16:10:50 -07:00

cipso_ipv4.c

Cipso: cipso_v4_optptr enter infinite loop

2017-08-01 15:31:23 -07:00

datagram.c

…

devinet.c

rtnetlink: make rtnl_register accept a flags parameter

2017-08-09 16:57:38 -07:00

esp4_offload.c

xfrm: Auto-load xfrm offload modules

2017-08-02 11:00:15 +02:00

esp4.c

esp4: Support RX checksum with crypto offload

2017-08-02 11:00:15 +02:00

fib_frontend.c

rtnetlink: make rtnl_register accept a flags parameter

2017-08-09 16:57:38 -07:00

fib_lookup.h

ipv4: do metrics match when looking up and deleting a route

2017-08-23 20:37:10 -07:00

fib_notifier.c

net: fib_rules: Implement notification logic in core

2017-08-03 15:35:59 -07:00

fib_rules.c

net: fib_rules: Implement notification logic in core

2017-08-03 15:35:59 -07:00

fib_semantics.c

ipv4: do metrics match when looking up and deleting a route

2017-08-23 20:37:10 -07:00

fib_trie.c

ipv4: do metrics match when looking up and deleting a route

2017-08-23 20:37:10 -07:00

fou.c

gue: fix remcsum when GRO on and CHECKSUM_PARTIAL boundary is outer UDP

2017-08-01 16:09:14 -07:00

gre_demux.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-06-30 05:03:36 -04:00

gre_offload.c

net: Remove all references to SKB_GSO_UDP.

2017-07-17 09:52:58 -07:00

icmp.c

ip/options: explicitly provide net ns to __ip_options_echo()

2017-08-06 20:51:12 -07:00

igmp.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-08-21 17:06:42 -07:00

inet_connection_sock.c

net: convert sock.sk_refcnt from atomic_t to refcount_t

2017-07-01 07:39:08 -07:00

inet_diag.c

net: inet: diag: expose sockets cgroup classid

2017-08-18 16:10:50 -07:00

inet_fragment.c

net: convert inet_frag_queue.refcnt from atomic_t to refcount_t

2017-07-01 07:39:09 -07:00

inet_hashtables.c

net: ipv4: add second dif to inet socket lookups

2017-08-07 11:39:21 -07:00

inet_timewait_sock.c

net: convert sock.sk_refcnt from atomic_t to refcount_t

2017-07-01 07:39:08 -07:00

inetpeer.c

inetpeer: remove AVL implementation in favor of RB tree

2017-07-17 08:59:01 -07:00

ip_forward.c

ipv4: allow local fragmentation in ip_finish_output_gso()

2016-11-03 16:10:26 -04:00

ip_fragment.c

net: convert inet_frag_queue.refcnt from atomic_t to refcount_t

2017-07-01 07:39:09 -07:00

ip_gre.c

gre: add collect_md mode to ERSPAN tunnel

2017-08-28 15:04:52 -07:00

ip_input.c

net: Add sysctl to toggle early demux for tcp and udp

2017-03-24 13:17:07 -07:00

ip_options.c

ip/options: explicitly provide net ns to __ip_options_echo()

2017-08-06 20:51:12 -07:00

ip_output.c

udp: remove unreachable ufo branches

2017-08-22 14:27:18 -07:00

ip_sockglue.c

net: ipv4: add check for l3slave for index returned in IP_PKTINFO

2017-08-13 20:05:13 -07:00

ip_tunnel_core.c

net: store port/representator id in metadata_dst

2017-06-25 11:42:01 -04:00

ip_tunnel.c

ip_tunnel: fix potential issue in ip_tunnel_rcv

2017-06-16 12:01:29 -04:00

ip_vti.c

vti: revert flush x-netns xfrm cache when vti interface is removed

2017-07-18 11:13:41 -07:00

ipcomp.c

…

ipconfig.c

networking: convert many more places to skb_put_zero()

2017-06-16 11:48:35 -04:00

ipip.c

net: add netlink_ext_ack argument to rtnl_link_ops.validate

2017-06-26 23:13:22 -04:00

ipmr.c

rtnetlink: make rtnl_register accept a flags parameter

2017-08-09 16:57:38 -07:00

Kconfig

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next

2017-02-16 21:25:49 -05:00

Makefile

tcp: ULP infrastructure

2017-06-15 12:12:40 -04:00

netfilter.c

netfilter: use skb_to_full_sk in ip_route_me_harder

2017-02-28 12:49:36 +01:00

ping.c

net: convert sock.sk_refcnt from atomic_t to refcount_t

2017-07-01 07:39:08 -07:00

proc.c

tcp: Revert "tcp: remove header prediction"

2017-08-30 11:20:09 -07:00

protocol.c

net: Add sysctl to toggle early demux for tcp and udp

2017-03-24 13:17:07 -07:00

raw_diag.c

net: ipv6: add second dif to raw socket lookups

2017-08-07 11:39:22 -07:00

raw.c

net: ipv4: add second dif to multicast source filter

2017-08-07 11:39:22 -07:00

route.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-08-21 17:06:42 -07:00

syncookies.c

ip/options: explicitly provide net ns to __ip_options_echo()

2017-08-06 20:51:12 -07:00

sysctl_net_ipv4.c

tcp: remove low_latency sysctl

2017-07-31 14:37:49 -07:00

tcp_bbr.c

tcp_bbr: init pacing rate on first RTT sample

2017-07-15 14:43:29 -07:00

tcp_bic.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_cdg.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_cong.c

tcp: fix cwnd undo in Reno and HTCP congestion controls

2017-08-06 21:25:10 -07:00

tcp_cubic.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_dctcp.c

Revert "dctcp: update cwnd on congestion event"

2016-12-06 11:34:24 -05:00

tcp_diag.c

net: diag: Fix refcnt leak in error path destroying socket

2016-08-23 23:11:36 -07:00

tcp_fastopen.c

tcp: Remove the unused parameter for tcp_try_fastopen.

2017-08-22 14:16:12 -07:00

tcp_highspeed.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_htcp.c

tcp: fix cwnd undo in Reno and HTCP congestion controls

2017-08-06 21:25:10 -07:00

tcp_hybla.c

tcp: make undo_cwnd mandatory for congestion modules

2016-11-21 13:20:17 -05:00

tcp_illinois.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_input.c

tcp: Revert "tcp: remove header prediction"

2017-08-30 11:20:09 -07:00

tcp_ipv4.c

tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg

2017-08-23 20:30:47 -07:00

tcp_lp.c

tcp: switch TCP TS option (RFC 7323) to 1ms clock

2017-05-17 16:06:01 -04:00

tcp_metrics.c

tcp: use tcp_jiffies32 to feed tp->snd_cwnd_stamp

2017-05-17 16:06:01 -04:00

tcp_minisocks.c

tcp: Revert "tcp: remove header prediction"

2017-08-30 11:20:09 -07:00

tcp_nv.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_offload.c

net: convert sock.sk_wmem_alloc from atomic_t to refcount_t

2017-07-01 07:39:08 -07:00

tcp_output.c

tcp: Revert "tcp: remove header prediction"

2017-08-30 11:20:09 -07:00

tcp_probe.c

tcp: remove redundant argument from tcp_rcv_established()

2017-07-24 17:28:12 -07:00

tcp_rate.c

tcp: export do_tcp_sendpages and tcp_rate_check_app_limited functions

2017-06-15 12:12:40 -04:00

tcp_recovery.c

tcp: adjust tail loss probe timeout

2017-07-19 16:14:10 -07:00

tcp_scalable.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_timer.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-08-09 16:28:45 -07:00

tcp_ulp.c

tcp: ulp: avoid module refcnt leak in tcp_set_ulp

2017-08-14 22:17:05 -07:00

tcp_vegas.c

tcp: make undo_cwnd mandatory for congestion modules

2016-11-21 13:20:17 -05:00

tcp_vegas.h

…

tcp_veno.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp_westwood.c

tcp: Revert "tcp: remove CA_ACK_SLOWPATH"

2017-08-30 11:20:08 -07:00

tcp_yeah.c

tcp: consolidate congestion control undo functions

2017-08-06 21:25:10 -07:00

tcp.c

tcp: Revert "tcp: remove header prediction"

2017-08-30 11:20:09 -07:00

tunnel4.c

tunnels: correct conditional build of MPLS and IPv6

2016-07-11 13:27:06 -07:00

udp_diag.c

net: ipv6: add second dif to udp socket lookups

2017-08-07 11:39:22 -07:00

udp_impl.h

udp: make *udp*_queue_rcv_skb() functions static

2017-05-18 10:23:33 -04:00

udp_offload.c

net: avoid skb_warn_bad_offload false positives on UFO

2017-08-08 21:39:01 -07:00

udp_tunnel.c

net: add infrastructure to un-offload UDP tunnel port

2017-07-24 13:52:59 -07:00

udp.c

udp: remove unreachable ufo branches

2017-08-22 14:27:18 -07:00

udplite.c

udplite: call proper backlog handlers

2016-11-24 15:32:14 -05:00

xfrm4_input.c

esp: Add a software GRO codepath

2017-02-15 11:04:11 +01:00

xfrm4_mode_beet.c

networking: make skb_pull & friends return void pointers

2017-06-16 11:48:39 -04:00

xfrm4_mode_transport.c

xfrm: Add encapsulation header offsets while SKB is not encrypted

2017-04-14 10:07:39 +02:00

xfrm4_mode_tunnel.c

xfrm: Add encapsulation header offsets while SKB is not encrypted

2017-04-14 10:07:39 +02:00

xfrm4_output.c

xfrm: Add an IPsec hardware offloading API

2017-04-14 10:06:10 +02:00

xfrm4_policy.c

net: xfrm: support setting an output mark.

2017-08-11 07:03:00 +02:00

xfrm4_protocol.c

xfrm: input: constify xfrm_input_afinfo

2017-02-09 10:22:17 +01:00

xfrm4_state.c

xfrm: remove unused function

2017-01-10 10:57:12 +01:00

xfrm4_tunnel.c

…