Eric Dumazet f4541d60a4 tcp: preserve ACK clocking in TSO ... A long standing problem with TSO is the fact that tcp_tso_should_defer() rearms the deferred timer, while it should not. Current code leads to following bad bursty behavior : 20:11:24.484333 IP A > B: . 297161:316921(19760) ack 1 win 119 20:11:24.484337 IP B > A: . ack 263721 win 1117 20:11:24.485086 IP B > A: . ack 265241 win 1117 20:11:24.485925 IP B > A: . ack 266761 win 1117 20:11:24.486759 IP B > A: . ack 268281 win 1117 20:11:24.487594 IP B > A: . ack 269801 win 1117 20:11:24.488430 IP B > A: . ack 271321 win 1117 20:11:24.489267 IP B > A: . ack 272841 win 1117 20:11:24.490104 IP B > A: . ack 274361 win 1117 20:11:24.490939 IP B > A: . ack 275881 win 1117 20:11:24.491775 IP B > A: . ack 277401 win 1117 20:11:24.491784 IP A > B: . 316921:332881(15960) ack 1 win 119 20:11:24.492620 IP B > A: . ack 278921 win 1117 20:11:24.493448 IP B > A: . ack 280441 win 1117 20:11:24.494286 IP B > A: . ack 281961 win 1117 20:11:24.495122 IP B > A: . ack 283481 win 1117 20:11:24.495958 IP B > A: . ack 285001 win 1117 20:11:24.496791 IP B > A: . ack 286521 win 1117 20:11:24.497628 IP B > A: . ack 288041 win 1117 20:11:24.498459 IP B > A: . ack 289561 win 1117 20:11:24.499296 IP B > A: . ack 291081 win 1117 20:11:24.500133 IP B > A: . ack 292601 win 1117 20:11:24.500970 IP B > A: . ack 294121 win 1117 20:11:24.501388 IP B > A: . ack 295641 win 1117 20:11:24.501398 IP A > B: . 332881:351881(19000) ack 1 win 119 While the expected behavior is more like : 20:19:49.259620 IP A > B: . 197601:202161(4560) ack 1 win 119 20:19:49.260446 IP B > A: . ack 154281 win 1212 20:19:49.261282 IP B > A: . ack 155801 win 1212 20:19:49.262125 IP B > A: . ack 157321 win 1212 20:19:49.262136 IP A > B: . 202161:206721(4560) ack 1 win 119 20:19:49.262958 IP B > A: . ack 158841 win 1212 20:19:49.263795 IP B > A: . ack 160361 win 1212 20:19:49.264628 IP B > A: . ack 161881 win 1212 20:19:49.264637 IP A > B: . 206721:211281(4560) ack 1 win 119 20:19:49.265465 IP B > A: . ack 163401 win 1212 20:19:49.265886 IP B > A: . ack 164921 win 1212 20:19:49.266722 IP B > A: . ack 166441 win 1212 20:19:49.266732 IP A > B: . 211281:215841(4560) ack 1 win 119 20:19:49.267559 IP B > A: . ack 167961 win 1212 20:19:49.268394 IP B > A: . ack 169481 win 1212 20:19:49.269232 IP B > A: . ack 171001 win 1212 20:19:49.269241 IP A > B: . 215841:221161(5320) ack 1 win 119 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Van Jacobson <vanj@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Nandita Dukkipati <nanditad@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-03-22 10:34:03 -04:00
..
netfilter	netfilter: remove unused "config IP_NF_QUEUE"	2013-03-20 00:11:43 +01:00
af_inet.c	IP_GRE: Fix IP-Identification.	2013-02-25 15:47:41 -05:00
ah4.c	net: Add skb_unclone() helper function.	2013-02-15 15:10:37 -05:00
arp.c	net: proc: change proc_net_remove to remove_proc_entry	2013-02-18 14:53:08 -05:00
cipso_ipv4.c
datagram.c	ipv4: Add a socket release callback for datagram sockets	2013-01-21 14:17:05 -05:00
devinet.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
esp4.c	xfrm4: Invalidate all ipv4 routes on IPsec pmtu events	2013-01-21 12:43:54 +01:00
fib_frontend.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
fib_lookup.h
fib_rules.c
fib_semantics.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
fib_trie.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
gre.c	v4 GRE: Add TCP segmentation offload for GRE	2013-02-15 15:17:11 -05:00
icmp.c	ipv4: fix error handling in icmp_protocol.	2013-02-22 15:10:18 -05:00
igmp.c	net: proc: change proc_net_remove to remove_proc_entry	2013-02-18 14:53:08 -05:00
inet_connection_sock.c	Fix: sparse warning in inet_csk_prepare_forced_close	2013-03-07 16:31:29 -05:00
inet_diag.c
inet_fragment.c	inet: limit length of fragment queue hash table bucket lists	2013-03-19 10:28:36 -04:00
inet_hashtables.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
inet_lro.c
inet_timewait_sock.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
inetpeer.c
ip_forward.c
ip_fragment.c	inet: limit length of fragment queue hash table bucket lists	2013-03-19 10:28:36 -04:00
ip_gre.c	Revert "ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally"	2013-03-16 23:00:41 -04:00
ip_input.c	ipv[4|6]: correct dropwatch false positive in local_deliver_finish	2013-03-01 15:56:29 -05:00
ip_options.c	net/ipv4: Ensure that location of timestamp option is stored	2013-03-12 05:35:39 -04:00
ip_output.c	net: Fix possible wrong checksum generation.	2013-02-13 13:30:10 -05:00
ip_sockglue.c	net: prevent setting ttl=0 via IP_TTL	2013-01-08 17:57:10 -08:00
ip_vti.c
ipcomp.c	ipcomp: Mark as netns_ok.	2013-02-04 15:46:15 -05:00
ipconfig.c	ipconfig: Fix newline handling in log message.	2013-03-20 12:15:58 -04:00
ipip.c	net: fix possible wrong checksum generation	2013-01-28 00:27:15 -05:00
ipmr.c	net: proc: change proc_net_remove to remove_proc_entry	2013-02-18 14:53:08 -05:00
Kconfig	net/ipv4: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:40:00 -08:00
Makefile
netfilter.c
ping.c	ipv4: fix a bug in ping_err().	2013-02-21 15:25:00 -05:00
proc.c	net: proc: change proc_net_remove to remove_proc_entry	2013-02-18 14:53:08 -05:00
protocol.c	ipv4: Disallow non-namespace aware protocols to register.	2013-02-05 14:42:23 -05:00
raw.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
route.c	net: ipv4: fix waring -Wunused-variable	2013-02-19 13:18:13 -05:00
syncookies.c	tcp: make sysctl_tcp_ecn namespace aware	2013-01-06 21:09:56 -08:00
sysctl_net_ipv4.c	tcp: remove Appropriate Byte Count support	2013-02-05 14:51:16 -05:00
tcp_bic.c
tcp_cong.c	tcp: remove Appropriate Byte Count support	2013-02-05 14:51:16 -05:00
tcp_cubic.c
tcp_diag.c
tcp_fastopen.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	tcp: fix double-counted receiver RTT when leaving receiver fast path	2013-03-04 14:12:07 -05:00
tcp_ipv4.c	tcp: dont handle MTU reduction on LISTEN socket	2013-03-18 13:31:28 -04:00
tcp_lp.c
tcp_memcontrol.c
tcp_metrics.c
tcp_minisocks.c	tcp: send packets with a socket timestamp	2013-02-13 13:22:16 -05:00
tcp_output.c	tcp: preserve ACK clocking in TSO	2013-03-22 10:34:03 -04:00
tcp_probe.c	net: proc: change proc_net_remove to remove_proc_entry	2013-02-18 14:53:08 -05:00
tcp_scalable.c
tcp_timer.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c	tcp: fix skb_availroom()	2013-03-14 11:49:45 -04:00
tunnel4.c
udp_diag.c
udp_impl.h
udp.c	udp: add encap_destroy callback	2013-03-20 12:10:38 -04:00
udplite.c
xfrm4_input.c	net: Add skb_unclone() helper function.	2013-02-15 15:10:37 -05:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c	ip: fix warning in xfrm4_mode_tunnel_input	2013-02-18 12:42:48 -05:00
xfrm4_output.c
xfrm4_policy.c	xfrm: make gc_thresh configurable in all namespaces	2013-02-06 11:36:29 +01:00
xfrm4_state.c
xfrm4_tunnel.c