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linux/net/ipv4
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Eric Dumazet ac3959fd0d tcp: remove obsolete check in __tcp_retransmit_skb() 
TSQ provides a nice way to avoid bufferbloat on individual socket,
including retransmit packets. We can get rid of the old
heuristic:

	/* Do not sent more than we queued. 1/4 is reserved for possible
	 * copying overhead: fragmentation, tunneling, mangling etc.
	 */
	if (refcount_read(&sk->sk_wmem_alloc) >
	    min_t(u32, sk->sk_wmem_queued + (sk->sk_wmem_queued >> 2),
		  sk->sk_sndbuf))
		return -EAGAIN;

This heuristic was giving false positives according to Jakub,
whenever TX completions are delayed above RTT. (Ack packets
are processed by TCP stack before clones are orphaned/freed)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Jakub Kicinski <kuba@kernel.org>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-11 18:35:31 -08:00
..
bpfilter
net: Revert "net: optimize the sockptr_t for unified kernel/user address spaces"
2020-08-10 12:06:44 -07:00
netfilter
netfilter: nftables: add nft_parse_register_load() and use it
2021-01-27 22:53:29 +01:00
af_inet.c
net: remove cmsg restriction from io_uring based send/recvmsg calls
2021-02-23 20:32:11 -07:00
ah4.c
inet: Use fallthrough;
2020-03-12 15:55:00 -07:00
arp.c
net: Exempt multicast addresses from five-second neighbor lifetime
2020-11-13 14:24:39 -08:00
bpf_tcp_ca.c
bpf: Remove hard-coded btf_vmlinux assumption from BPF verifier
2020-12-03 17:38:21 -08:00
cipso_ipv4.c
CIPSO: Fix unaligned memory access in cipso_v4_gentag_hdr
2021-03-05 13:00:38 -08:00
datagram.c
inet: stop leaking jiffies on the wire
2019-11-01 14:57:52 -07:00
devinet.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
esp4_offload.c
net: Simplify the calculation of variables
2021-01-27 11:49:55 +01:00
esp4.c
esp: avoid unneeded kmap_atomic call
2021-01-11 18:20:09 -08:00
fib_frontend.c
ipv4: Ignore ECN bits for fib lookups in fib_compute_spec_dst()
2020-12-28 14:44:32 -08:00
fib_lookup.h
IPv4: Add "offload failed" indication to routes
2021-02-08 16:47:03 -08:00
fib_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_rules.c
fib: use indirect call wrappers in the most common fib_rules_ops
2020-07-28 17:42:31 -07:00
fib_semantics.c
IPv4: Add "offload failed" indication to routes
2021-02-08 16:47:03 -08:00
fib_trie.c
IPv4: Extend 'fib_notify_on_flag_change' sysctl
2021-02-08 16:47:03 -08:00
fou.c
genetlink: move to smaller ops wherever possible
2020-10-02 19:11:11 -07:00
gre_demux.c
erspan: fix version 1 check in gre_parse_header()
2020-12-28 15:00:00 -08:00
gre_offload.c
ip_gre: add csum offload support for gre header
2021-01-29 20:39:14 -08:00
icmp.c
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
2021-02-23 11:29:52 -08:00
igmp.c
ip*_mc_gsfget(): lift copyout of struct group_filter into callers
2020-05-20 20:31:27 -04:00
inet_connection_sock.c
tcp: fix TCP_USER_TIMEOUT with zero window
2021-01-18 19:59:17 -08:00
inet_diag.c
inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill()
2020-11-17 16:08:36 -08:00
inet_fragment.c
inet: frags: batch fqdir destroy works
2020-12-12 15:08:54 -08:00
inet_hashtables.c
tcp: add some entropy in __inet_hash_connect()
2021-02-11 13:13:05 -08:00
inet_timewait_sock.c
net: Use generic ns_common::count
2020-08-19 14:06:36 +02:00
inetpeer.c
inetpeer: use div64_ul() and clamp_val() calculate inet_peer_threshold
2021-03-01 13:32:12 -08:00
ip_forward.c
ipv4: Revert removal of rt_uses_gateway
2019-09-20 18:23:33 -07:00
ip_fragment.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
ip_gre.c
ipv4/ipv6: switch to dev_get_tstats64
2020-11-09 17:50:28 -08:00
ip_input.c
net: use indirect call helpers for dst_input
2021-02-03 14:51:39 -08:00
ip_options.c
net: clean up codestyle for net/ipv4
2020-08-25 06:28:02 -07:00
ip_output.c
net: use indirect call helpers for dst_output
2021-02-03 14:51:39 -08:00
ip_sockglue.c
net: Remove duplicated midx check against 0
2020-08-25 06:23:59 -07:00
ip_tunnel_core.c
net: ip_tunnel: clean up endianness conversions
2021-01-08 19:25:35 -08:00
ip_tunnel.c
net: always use icmp{,v6}_ndo_send from ndo_start_xmit
2021-03-01 13:11:35 -08:00
ip_vti.c
net: always use icmp{,v6}_ndo_send from ndo_start_xmit
2021-03-01 13:11:35 -08:00
ipcomp.c
ipcomp: assign if_id to child tunnel from parent tunnel
2020-07-09 12:55:37 +02:00
ipconfig.c
net: ipconfig: avoid use-after-free in ic_close_devs
2021-02-11 14:31:39 -08:00
ipip.c
ipv4/ipv6: switch to dev_get_tstats64
2020-11-09 17:50:28 -08:00
ipmr_base.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
ipmr.c
ipmr: Use full VIF ID in netlink cache reports
2020-09-10 12:25:51 -07:00
Kconfig
net: ipv4: remove duplicate "the the" phrase in Kconfig text
2020-08-18 16:02:16 -07:00
Makefile
bpf: Clean up sockmap related Kconfigs
2021-02-26 12:28:03 -08:00
metrics.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
netfilter.c
netfilter: use actual socket sk rather than skb sk when routing harder
2020-10-30 12:57:39 +01:00
netlink.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
nexthop.c
nexthop: Enable resilient next-hop groups
2021-03-11 16:13:00 -08:00
ping.c
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
2020-11-23 18:36:21 -05:00
proc.c
net: proc: speedup /proc/net/netstat
2021-01-29 20:59:53 -08:00
protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
raw_diag.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-03-12 22:34:48 -07:00
raw.c
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
2020-11-23 18:36:21 -05:00
route.c
net: ipv4: route.c: fix space before tab
2021-03-10 15:37:19 -08:00
syncookies.c
selinux/stable-5.11 PR 20201214
2020-12-16 11:01:04 -08:00
sysctl_net_ipv4.c
IPv4: Extend 'fib_notify_on_flag_change' sysctl
2021-02-08 16:47:03 -08:00
tcp_bbr.c
tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate
2020-11-17 11:03:22 -08:00
tcp_bic.c
tcp: fix stretch ACK bugs in BIC
2020-03-16 18:26:54 -07:00
tcp_bpf.c
bpf: Clean up sockmap related Kconfigs
2021-02-26 12:28:03 -08:00
tcp_cdg.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_cong.c
tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control
2020-11-20 18:09:47 -08:00
tcp_cubic.c
tcp_cubic: use memset and offsetof init
2021-01-15 20:22:16 -08:00
tcp_dctcp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_dctcp.h
tcp: refactor DCTCP ECN ACK handling
2018-10-10 22:26:00 -07:00
tcp_diag.c
inet_diag: Move the INET_DIAG_REQ_BYTECODE nlattr to cb->data
2020-02-27 18:50:19 -08:00
tcp_fastopen.c
bpf: tcp: Add bpf_skops_established()
2020-08-24 14:35:00 -07:00
tcp_highspeed.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_htcp.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_hybla.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_illinois.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_input.c
tcp: consider using standard rtx logic in tcp_rcv_fastopen_synack()
2021-03-11 18:35:31 -08:00
tcp_ipv4.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-02-16 13:14:06 -08:00
tcp_lp.c
net: ipv4: Fix some kerneldoc warnings in TCP Low Priority
2020-10-30 12:10:57 -07:00
tcp_metrics.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
tcp_minisocks.c
tcp: parse mptcp options contained in reset packets
2020-12-14 17:30:06 -08:00
tcp_nv.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_output.c
tcp: remove obsolete check in __tcp_retransmit_skb()
2021-03-11 18:35:31 -08:00
tcp_rate.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
tcp_recovery.c
tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN
2021-01-23 21:33:01 -08:00
tcp_scalable.c
net: ipv4: delete repeated words
2020-08-24 17:31:20 -07:00
tcp_timer.c
tcp: make TCP_USER_TIMEOUT accurate for zero window probes
2021-01-23 19:32:51 -08:00
tcp_ulp.c
bpf: sockmap: Only check ULP for TCP sockets
2020-03-09 22:34:58 +01:00
tcp_vegas.c
tcp: use semicolons rather than commas to separate statements
2020-10-13 17:11:52 -07:00
tcp_vegas.h
…
tcp_veno.c
Replace HTTP links with HTTPS ones: IPv*
2020-07-06 13:23:03 -07:00
tcp_westwood.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_yeah.c
tcp: fix stretch ACK bugs in Yeah
2020-03-16 18:26:55 -07:00
tcp.c
tcp: add sanity tests to TCP_QUEUE_SEQ
2021-03-01 15:32:05 -08:00
tunnel4.c
tunnel4: add cb_handler to struct xfrm_tunnel
2020-07-09 12:51:36 +02:00
udp_bpf.c
net: sk_msg: Simplify sk_psock initialization
2020-08-21 15:16:11 -07:00
udp_diag.c
net: udp: remove redundant initialization in udp_dump_one
2020-11-09 16:42:49 -08:00
udp_impl.h
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
udp_offload.c
net: Fix gro aggregation for udp encaps with zero csum
2021-02-28 12:01:08 -08:00
udp_tunnel_core.c
udp_tunnel: reshuffle NETIF_F_RX_UDP_TUNNEL_PORT checks
2021-01-07 12:53:29 -08:00
udp_tunnel_nic.c
udp_tunnel: add the ability to share port tables
2020-09-28 12:50:12 -07:00
udp_tunnel_stub.c
udp_tunnel: add central NIC RX port offload infrastructure
2020-07-10 13:54:00 -07:00
udp.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-02-16 13:14:06 -08:00
udplite.c
net/ipv4: remove compat_ip_{get,set}sockopt
2020-07-19 18:16:41 -07:00
xfrm4_input.c
xfrm: state: remove extract_input indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm4_output.c
xfrm: fix unused variable warning if CONFIG_NETFILTER=n
2020-05-11 15:12:27 +02:00
xfrm4_policy.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2019-12-24 22:28:54 -08:00
xfrm4_protocol.c
xfrm: add route lookup to xfrm4_rcv_encap
2019-12-09 09:59:07 +01:00
xfrm4_state.c
xfrm: remove output_finish indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm4_tunnel.c
xfrm: interface: fix the priorities for ipip and ipv6 tunnels
2020-10-09 12:29:48 +02:00