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linux/net/ipv4
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Neal Cardwell cdbeb633ca tcp: when rearming RTO, if RTO time is in past then fire RTO ASAP 
In some situations tcp_send_loss_probe() can realize that it's unable
to send a loss probe (TLP), and falls back to calling tcp_rearm_rto()
to schedule an RTO timer. In such cases, sometimes tcp_rearm_rto()
realizes that the RTO was eligible to fire immediately or at some
point in the past (delta_us <= 0). Previously in such cases
tcp_rearm_rto() was scheduling such "overdue" RTOs to happen at now +
icsk_rto, which caused needless delays of hundreds of milliseconds
(and non-linear behavior that made reproducible testing
difficult). This commit changes the logic to schedule "overdue" RTOs
ASAP, rather than at now + icsk_rto.

Fixes: 6ba8a3b19e ("tcp: Tail loss probe (TLP)")
Suggested-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-08-18 16:07:43 -07:00
..
netfilter netfilter: nf_tables: only allow in/output for arp packets 2017-07-17 17:02:44 +02:00
Kconfig
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Makefile tcp: ULP infrastructure 2017-06-15 12:12:40 -04:00
af_inet.c igmp: Fix regression caused by igmp sysctl namespace code. 2017-08-09 22:46:44 -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 networking: make skb_put & friends return void pointers 2017-06-16 11:48:39 -04:00
cipso_ipv4.c Cipso: cipso_v4_optptr enter infinite loop 2017-08-01 15:31:23 -07:00
datagram.c
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devinet.c net: convert in_device.refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
esp4.c net: convert sock.sk_wmem_alloc from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
esp4_offload.c
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fib_frontend.c ipv4: initialize fib_trie prior to register_netdev_notifier call. 2017-07-20 15:24:45 -07:00
fib_lookup.h net: add extack arg to lwtunnel build state 2017-05-30 11:55:32 -04:00
fib_notifier.c
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fib_rules.c
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fib_semantics.c ipv4: fix NULL dereference in free_fib_info_rcu() 2017-08-15 17:07:52 -07:00
fib_trie.c net, ipv4: convert fib_info.fib_clntref from atomic_t to refcount_t 2017-07-04 01:29:04 -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
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gre_offload.c
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icmp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-15 11:59:32 -04:00
igmp.c net: igmp: Use ingress interface rather than vrf device 2017-08-16 11:08:55 -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
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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: make sk_ehashfn() static 2017-07-03 03:29:14 -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 net: convert inet_peer.refcnt from atomic_t to refcount_t 2017-07-01 07:39:07 -07:00
ip_forward.c
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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 net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
ip_input.c
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ip_options.c
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ip_output.c udp: consistently apply ufo or fragmentation 2017-08-10 09:52:12 -07:00
ip_sockglue.c do_ip_setsockopt(): don't open-code memdup_user() 2017-06-30 02:04:09 -04:00
ip_tunnel.c ip_tunnel: fix potential issue in ip_tunnel_rcv 2017-06-16 12:01:29 -04:00
ip_tunnel_core.c net: store port/representator id in metadata_dst 2017-06-25 11:42:01 -04:00
ip_vti.c net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
ipcomp.c
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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 net: ipmr: ipmr_get_table() returns NULL 2017-07-12 08:18:46 -07:00
netfilter.c
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ping.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
proc.c tcp: add TCPMemoryPressuresChrono counter 2017-06-08 11:26:19 -04:00
protocol.c
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raw.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
raw_diag.c
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route.c net: check and errout if res->fi is NULL when RTM_F_FIB_MATCH is set 2017-08-18 16:05:46 -07:00
syncookies.c ipv4: ipv6: initialize treq->txhash in cookie_v[46]_check() 2017-07-18 11:22:51 -07:00
sysctl_net_ipv4.c tcp: ULP infrastructure 2017-06-15 12:12:40 -04:00
tcp.c bpf: Add support for changing congestion control 2017-07-01 16:15:14 -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
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tcp_cdg.c
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tcp_cong.c bpf: Add support for changing congestion control 2017-07-01 16:15:14 -07:00
tcp_cubic.c
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tcp_dctcp.c
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tcp_diag.c
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tcp_fastopen.c bpf: Add TCP connection BPF callbacks 2017-07-01 16:15:14 -07:00
tcp_highspeed.c
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tcp_htcp.c
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tcp_hybla.c
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tcp_illinois.c
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tcp_input.c tcp: when rearming RTO, if RTO time is in past then fire RTO ASAP 2017-08-18 16:07:43 -07:00
tcp_ipv4.c tcp: fix possible deadlock in TCP stack vs BPF filter 2017-08-14 22:31:27 -07:00
tcp_lp.c
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tcp_metrics.c
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tcp_minisocks.c bpf: Support for setting initial receive window 2017-07-01 16:15:13 -07:00
tcp_nv.c
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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: fastopen: tcp_connect() must refresh the route 2017-08-08 20:39:52 -07:00
tcp_probe.c
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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
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tcp_scalable.c
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tcp_timer.c net: fix keepalive code vs TCP_FASTOPEN_CONNECT 2017-08-03 09:34:51 -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
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tcp_vegas.h
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tcp_veno.c
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tcp_westwood.c
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tcp_yeah.c
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tunnel4.c
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udp.c datagram: When peeking datagrams with offset < 0 don't skip empty skbs 2017-08-18 15:12:54 -07:00
udp_diag.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
udp_impl.h
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udp_offload.c net: avoid skb_warn_bad_offload false positives on UFO 2017-08-08 21:39:01 -07:00
udp_tunnel.c
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udplite.c
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xfrm4_input.c
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xfrm4_mode_beet.c networking: make skb_pull & friends return void pointers 2017-06-16 11:48:39 -04:00
xfrm4_mode_transport.c
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xfrm4_mode_tunnel.c
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xfrm4_output.c
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xfrm4_policy.c
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xfrm4_protocol.c
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xfrm4_state.c
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xfrm4_tunnel.c
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