Florian Westphal 343dfaa198 Revert "dctcp: update cwnd on congestion event" ... Neal Cardwell says: If I am reading the code correctly, then I would have two concerns: 1) Has that been tested? That seems like an extremely dramatic decrease in cwnd. For example, if the cwnd is 80, and there are 40 ACKs, and half the ACKs are ECE marked, then my back-of-the-envelope calculations seem to suggest that after just 11 ACKs the cwnd would be down to a minimal value of 2 [..] 2) That seems to contradict another passage in the draft [..] where it sazs: Just as specified in [RFC3168], DCTCP does not react to congestion indications more than once for every window of data. Neal is right. Fortunately we don't have to complicate this by testing vs. current rtt estimate, we can just revert the patch. Normal stack already handles this for us: receiving ACKs with ECE set causes a call to tcp_enter_cwr(), from there on the ssthresh gets adjusted and prr will take care of cwnd adjustment. Fixes: 4780566784 ("dctcp: update cwnd on congestion event") Cc: Neal Cardwell <ncardwell@google.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-12-06 11:34:24 -05:00
..
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
af_inet.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
ah4.c
arp.c
cipso_ipv4.c
datagram.c
devinet.c	netconf: add a notif when settings are created	2016-09-01 15:18:08 -07:00
esp4.c	esp4: Fix integrity verification when ESN are used	2016-11-30 11:09:39 +01:00
fib_frontend.c	ipv4: fib: Allow for consistent FIB dumping	2016-12-03 19:29:35 -05:00
fib_lookup.h
fib_rules.c	switchdev: remove FIB offload infrastructure	2016-09-28 04:48:00 -04:00
fib_semantics.c	ipv4: fib: Export free_fib_info()	2016-12-03 19:29:35 -05:00
fib_trie.c	ipv4: fib: Replay events when registering FIB notifier	2016-12-03 19:29:35 -05:00
fou.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-30 12:42:58 -04:00
gre_demux.c
gre_offload.c	net: add recursion limit to GRO	2016-10-20 14:32:22 -04:00
icmp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-15 10:54:36 -05:00
igmp.c	igmp: do not remove igmp souce list info when set link down	2016-11-15 19:51:16 -05:00
inet_connection_sock.c	net: inet: Support UID-based routing in IP protocols.	2016-11-04 14:45:23 -04:00
inet_diag.c	tcp: no longer hold ehash lock while calling tcp_get_info()	2016-11-09 13:02:27 -05:00
inet_fragment.c
inet_hashtables.c	net: Require exact match for TCP socket lookups if dif is l3mdev	2016-10-17 10:17:05 -04:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
ip_fragment.c
ip_gre.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
ip_input.c	net: VRF: Pass original iif to ip_route_input()	2016-09-16 04:24:07 -04:00
ip_options.c
ip_output.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
ip_sockglue.c	net/sock: add an explicit sk argument for ip_cmsg_recv_offset()	2016-11-07 13:24:41 -05:00
ip_tunnel_core.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
ip_tunnel.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
ip_vti.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
ipcomp.c
ipconfig.c
ipip.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
ipmr.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-15 10:54:36 -05:00
Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
Makefile	net: ip, diag -- Add diag interface for raw sockets	2016-10-23 19:35:24 -04:00
netfilter.c	netfilter: Update ip_route_me_harder to consider L3 domain	2016-11-24 12:44:36 +01:00
ping.c	net: inet: Support UID-based routing in IP protocols.	2016-11-04 14:45:23 -04:00
proc.c	net: Suppress the "Comparison to NULL could be written" warnings	2016-09-30 01:50:45 -04:00
protocol.c
raw_diag.c	net: ip, raw_diag -- Use jump for exiting from nested loop	2016-11-03 15:25:26 -04:00
raw.c	net: Update raw socket bind to consider l3 domain	2016-11-07 13:14:34 -05:00
route.c	route: Set lwtstate for local traffic and cached input dsts	2016-12-02 10:51:49 -05:00
syncookies.c	tcp: randomize tcp timestamp offsets for each connection	2016-12-02 12:49:59 -05:00
sysctl_net_ipv4.c	ipv4: use the right lock for ping_group_range	2016-10-22 16:23:12 -04:00
tcp_bbr.c	tcp_bbr: add a state transition diagram and accompanying comment	2016-10-29 17:12:43 -04:00
tcp_bic.c
tcp_cdg.c	tcp: cdg: rename struct minmax in tcp_cdg.c to avoid a naming conflict	2016-09-21 00:22:59 -04:00
tcp_cong.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
tcp_cubic.c
tcp_dctcp.c	Revert "dctcp: update cwnd on congestion event"	2016-12-06 11:34:24 -05:00
tcp_diag.c
tcp_fastopen.c	tcp: fastopen: avoid negative sk_forward_alloc	2016-09-08 16:08:10 -07:00
tcp_highspeed.c	tcp: add cwnd_undo functions to various tcp cc algorithms	2016-11-21 13:20:17 -05:00
tcp_htcp.c
tcp_hybla.c	tcp: make undo_cwnd mandatory for congestion modules	2016-11-21 13:20:17 -05:00
tcp_illinois.c	tcp: add cwnd_undo functions to various tcp cc algorithms	2016-11-21 13:20:17 -05:00
tcp_input.c	tcp: allow to turn tcp timestamp randomization off	2016-12-02 12:49:59 -05:00
tcp_ipv4.c	tcp: tsq: move tsq_flags close to sk_wmem_alloc	2016-12-05 13:32:24 -05:00
tcp_lp.c	tcp: make undo_cwnd mandatory for congestion modules	2016-11-21 13:20:17 -05:00
tcp_metrics.c	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
tcp_minisocks.c	tcp: randomize tcp timestamp offsets for each connection	2016-12-02 12:49:59 -05:00
tcp_nv.c
tcp_offload.c	gso: Support partial splitting at the frag_list pointer	2016-09-19 20:59:34 -04:00
tcp_output.c	tcp: tsq: move tsq_flags close to sk_wmem_alloc	2016-12-05 13:32:24 -05:00
tcp_probe.c
tcp_rate.c	tcp: export data delivery rate	2016-09-21 00:23:00 -04:00
tcp_recovery.c
tcp_scalable.c	tcp: add cwnd_undo functions to various tcp cc algorithms	2016-11-21 13:20:17 -05:00
tcp_timer.c	tcp: tsq: move tsq_flags close to sk_wmem_alloc	2016-12-05 13:32:24 -05:00
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: add cwnd_undo functions to various tcp cc algorithms	2016-11-21 13:20:17 -05:00
tcp_westwood.c	tcp: make undo_cwnd mandatory for congestion modules	2016-11-21 13:20:17 -05:00
tcp_yeah.c	tcp: add cwnd_undo functions to various tcp cc algorithms	2016-11-21 13:20:17 -05:00
tcp.c	tcp: tsq: move tsq_flags close to sk_wmem_alloc	2016-12-05 13:32:24 -05:00
tunnel4.c
udp_diag.c	net: inet: diag: expose the socket mark to privileged processes.	2016-09-08 16:13:09 -07:00
udp_impl.h	udplite: call proper backlog handlers	2016-11-24 15:32:14 -05:00
udp_offload.c	net: add recursion limit to GRO	2016-10-20 14:32:22 -04:00
udp_tunnel.c
udp.c	udp: be less conservative with sock rmem accounting	2016-12-03 16:14:48 -05:00
udplite.c	udplite: call proper backlog handlers	2016-11-24 15:32:14 -05:00
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-09-12 15:52:44 -07:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c