Ilpo Järvinen e317f6f69c [TCP]: FRTO undo response falls back to ratehalving one if ECEd ... Undoing ssthresh is disabled in fastretrans_alert whenever FLAG_ECE is set by clearing prior_ssthresh. The clearing does not protect FRTO because FRTO operates before fastretrans_alert. Moving the clearing of prior_ssthresh earlier seems to be a suboptimal solution to the FRTO case because then FLAG_ECE will cause a second ssthresh reduction in try_to_open (the first occurred when FRTO was entered). So instead, FRTO falls back immediately to the rate halving response, which switches TCP to CA_CWR state preventing the latter reduction of ssthresh. If the first ECE arrived before the ACK after which FRTO is able to decide RTO as spurious, prior_ssthresh is already cleared. Thus no undoing for ssthresh occurs. Besides, FLAG_ECE should be set also in the following ACKs resulting in rate halving response that sees TCP is already in CA_CWR, which again prevents an extra ssthresh reduction on that round-trip. If the first ECE arrived before RTO, ssthresh has already been adapted and prior_ssthresh remains cleared on entry because TCP is in CA_CWR (the same applies also to a case where FRTO is entered more than once and ECE comes in the middle). High_seq must not be touched after tcp_enter_cwr because CWR round-trip calculation depends on it. I believe that after this patch, FRTO should be ECN-safe and even able to take advantage of synergy benefits. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>		2007-04-25 22:23:26 -07:00
..
ipvs	[PATCH] sysctl: remove insert_at_head from register_sysctl	2007-02-14 08:09:59 -08:00
netfilter	[NETFILTER] arp_tables: Fix unaligned accesses.	2007-04-13 16:37:54 -07:00
af_inet.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
ah4.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
arp.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
cipso_ipv4.c	[NetLabel]: parse the CIPSO ranged tag on incoming packets	2007-03-12 14:38:02 -07:00
datagram.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
devinet.c	[IPV4]: Fix rtm_to_ifaddr() error handling.	2007-03-09 13:43:24 -08:00
esp4.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
fib_frontend.c	[NETLINK]: Infinite recursion in netlink.	2007-04-25 13:07:28 -07:00
fib_hash.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
fib_lookup.h	[IPV4]: net/ipv4/fib annotations	2006-09-28 18:02:23 -07:00
fib_rules.c	[NET]: Fix fib_rules compatibility breakage	2007-03-25 18:48:00 -07:00
fib_semantics.c	[IPv4] fib: Fix out of bound access of fib_props[]	2007-03-25 18:48:03 -07:00
fib_trie.c	[IPV4] fib_trie: Document locking.	2007-03-26 14:22:22 -07:00
icmp.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
igmp.c	[IPV4]: Fix warning in ip_mc_rejoin_group.	2007-03-12 17:02:37 -07:00
inet_connection_sock.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
inet_diag.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
inet_hashtables.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
inet_timewait_sock.c	[NET]: change layout of ehash table	2007-02-08 14:16:46 -08:00
inetpeer.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ip_forward.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ip_fragment.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
ip_gre.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ip_input.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
ip_options.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
ip_output.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ip_sockglue.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ipcomp.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
ipconfig.c	[PATCH] mark struct file_operations const 7	2007-02-12 09:48:46 -08:00
ipip.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
ipmr.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
Kconfig	[TCP] YeAH-TCP: algorithm implementation	2007-04-25 22:23:18 -07:00
Makefile	[TCP] YeAH-TCP: algorithm implementation	2007-04-25 22:23:18 -07:00
multipath_drr.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
multipath_random.c	[IPV4]: Use random32() in net/ipv4/multipath	2007-02-26 11:43:00 -08:00
multipath_rr.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
multipath_wrandom.c	[IPV4]: Use random32() in net/ipv4/multipath	2007-02-26 11:43:00 -08:00
multipath.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
netfilter.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
proc.c	[PATCH] mark struct file_operations const 7	2007-02-12 09:48:46 -08:00
protocol.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
raw.c	[PATCH] mark struct file_operations const 7	2007-02-12 09:48:46 -08:00
route.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00
syncookies.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
sysctl_net_ipv4.c	[TCP]: Add two new spurious RTO responses to FRTO	2007-04-25 22:23:23 -07:00
tcp_bic.c	[TCP] tcp_bic: use BUILD_BUG_ON	2006-09-22 15:18:04 -07:00
tcp_cong.c	[TCP]: Add RFC3742 Limited Slow-Start, controlled by variable sysctl_tcp_max_ssthresh.	2007-04-25 22:23:19 -07:00
tcp_cubic.c	[TCP]: Use read mostly for CUBIC parameters.	2007-02-12 13:15:20 -08:00
tcp_diag.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
tcp_highspeed.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
tcp_htcp.c	[TCP]: cleanup of htcp (resend)	2007-02-12 13:34:03 -08:00
tcp_hybla.c	[TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON	2006-09-22 15:18:13 -07:00
tcp_input.c	[TCP]: FRTO undo response falls back to ratehalving one if ECEd	2007-04-25 22:23:26 -07:00
tcp_ipv4.c	[TCP]: struct *sock argument renamed: sp -> sk	2007-04-25 22:23:20 -07:00
tcp_lp.c	[TCP] tcp-lp: prevent chance for oops	2006-09-28 18:03:07 -07:00
tcp_minisocks.c	[TCP]: Keep copied_seq, rcv_wup and rcv_next together.	2007-04-25 22:23:21 -07:00
tcp_output.c	[TCP]: Add two new spurious RTO responses to FRTO	2007-04-25 22:23:23 -07:00
tcp_probe.c	[PATCH] mark struct file_operations const 7	2007-02-12 09:48:46 -08:00
tcp_scalable.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
tcp_timer.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
tcp_vegas.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
tcp_veno.c	[TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON	2006-09-22 15:18:13 -07:00
tcp_westwood.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
tcp_yeah.c	[TCP] YeAH-TCP: algorithm implementation	2007-04-25 22:23:18 -07:00
tcp_yeah.h	[TCP] YeAH-TCP: algorithm implementation	2007-04-25 22:23:18 -07:00
tcp.c	[TCP]: Fix tcp_mem[] initialization.	2007-03-16 15:04:03 -07:00
tunnel4.c	[IPSEC]: Changing API of xfrm4_tunnel_register.	2007-02-13 12:54:47 -08:00
udp_impl.h	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
udp.c	[UDP]: Reread uh pointer after pskb_trim	2007-03-07 16:08:04 -08:00
udplite.c	[NET]: Possible cleanups.	2006-12-02 21:31:51 -08:00
xfrm4_input.c	[IPSEC]: Changing API of xfrm4_tunnel_register.	2007-02-13 12:54:47 -08:00
xfrm4_mode_beet.c	[XFRM]: beet: fix pseudo header length value	2007-04-23 22:39:02 -07:00
xfrm4_mode_transport.c	[IPSEC]: output mode to take an xfrm state as input param	2006-09-22 15:18:48 -07:00
xfrm4_mode_tunnel.c	[XFRM_TUNNEL]: Reload header pointer after pskb_may_pull/pskb_expand_head	2007-02-26 11:43:01 -08:00
xfrm4_output.c	[NET] IPV4: Fix whitespace errors.	2007-02-10 23:19:39 -08:00
xfrm4_policy.c	[XFRM]: Fix oops in xfrm4_dst_destroy()	2007-02-26 12:10:32 -08:00
xfrm4_state.c	[IPSEC]: exporting xfrm_state_afinfo	2007-02-08 12:39:00 -08:00
xfrm4_tunnel.c	[IPSEC]: Changing API of xfrm4_tunnel_register.	2007-02-13 12:54:47 -08:00