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linux-sg2042/net
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Eric Dumazet 3f80e08f40 tcp: add tcp_reset_xmit_timer() helper 
With EDT model, SRTT no longer is inflated by pacing delays.

This means that RTO and some other xmit timers might be setup
incorrectly. This is particularly visible with either :

- Very small enforced pacing rates (SO_MAX_PACING_RATE)
- Reduced rto (from the default 200 ms)

This can lead to TCP flows aborts in the worst case,
or spurious retransmits in other cases.

For example, this session gets far more throughput
than the requested 80kbit :

$ netperf -H 127.0.0.2 -l 100 -- -q 10000
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 127.0.0.2 () port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

540000 262144 262144    104.00      2.66

With the fix :

$ netperf -H 127.0.0.2 -l 100 -- -q 10000
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 127.0.0.2 () port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

540000 262144 262144    104.00      0.12

EDT allows for better control of rtx timers, since TCP has
a better idea of the earliest departure time of each skb
in the rtx queue. We only have to eventually add to the
timer the difference of the EDT time with current time.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2018-10-23 19:42:44 -07:00
..
6lowpan 6lowpan: iphc: reset mac_header after decompress to fix panic 2018-07-06 12:32:12 +02:00
9p Pull request for inclusion in 4.19, take two 2018-08-17 17:27:58 -07:00
802
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8021q netpoll: allow cleanup to be synchronous 2018-10-19 17:01:43 -07:00
appletalk Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
atm Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
ax25 ax25: remove blank line at EOF 2018-07-24 14:10:42 -07:00
batman-adv Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-09-25 10:35:29 -07:00
bluetooth Bluetooth: Remove redundant check on status 2018-10-14 10:31:25 +02:00
bpf bpf: add tests for direct packet access from CGROUP_SKB 2018-10-19 13:49:34 -07:00
bpfilter net: bpfilter: Set user mode helper's command line 2018-10-22 19:37:36 -07:00
bridge netpoll: allow cleanup to be synchronous 2018-10-19 17:01:43 -07:00
caif Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
can Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
ceph crush: fix using plain integer as NULL warning 2018-08-13 17:55:44 +02:00
core Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
dcb net: dcb: Add priority-to-DSCP map getters 2018-07-27 13:17:50 -07:00
dccp Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
decnet decnet: Remove unnecessary check for dev->name 2018-09-21 19:48:36 -07:00
dns_resolver dns: Allow the dns resolver to retrieve a server set 2018-10-04 09:40:52 -07:00
dsa net: dsa: legacy: simplify getting .driver_data 2018-10-22 19:49:04 -07:00
ethernet net: Convert GRO SKB handling to list_head. 2018-06-26 11:33:04 +09:00
hsr
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ieee802154 net/ipfrag: let ip[6]frag_high_thresh in ns be higher than in init_net 2018-09-21 19:45:52 -07:00
ife
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ipv4 tcp: add tcp_reset_xmit_timer() helper 2018-10-23 19:42:44 -07:00
ipv6 net/ipv6: Add support for dumping addresses for a specific device 2018-10-22 19:33:29 -07:00
iucv Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
kcm Revert "kcm: remove any offset before parsing messages" 2018-09-17 18:43:42 -07:00
key Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2018-07-27 09:33:37 -07:00
l2tp l2tp: fix unused function warning 2018-08-13 20:45:49 -07:00
l3mdev
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lapb
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llc llc: do not use sk_eat_skb() 2018-10-22 19:59:20 -07:00
mac80211 mac80211: implement ieee80211_tx_rate_update to update rate 2018-10-12 13:05:40 +02:00
mac802154 net: mac802154: tx: expand tailroom if necessary 2018-08-06 11:21:37 +02:00
mpls net/mpls: Handle kernel side filtering of route dumps 2018-10-16 00:14:07 -07:00
ncsi net/ncsi: Add NCSI Broadcom OEM command 2018-10-17 22:14:54 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2018-10-22 20:21:30 -07:00
netlabel netlabel: check for IPV4MASK in addrinfo_get 2018-09-21 18:58:34 -07:00
netlink netlink: Add answer_flags to netlink_callback 2018-10-16 00:13:12 -07:00
netrom Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
nfc Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
nsh nsh: set mac len based on inner packet 2018-07-12 16:55:29 -07:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2018-10-08 21:28:55 -07:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-06 14:43:42 -07:00
phonet Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
psample
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qrtr net: qrtr: Reset the node and port ID of broadcast messages 2018-07-05 20:20:03 +09:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-12 21:38:46 -07:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-09-04 21:33:03 -07:00
rose Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
rxrpc Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
sched net/sched: act_police: disallow 'goto chain' on fallback control action 2018-10-22 19:42:50 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
smc Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
strparser bpf, sockmap: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
sunrpc NFS client updates for Linux 4.19 2018-08-23 16:03:58 -07:00
switchdev
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tipc Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
tls ulp: remove uid and user_visible members 2018-10-20 23:13:32 -07:00
unix Revert "net: simplify sock_poll_wait" 2018-10-23 10:57:06 -07:00
vmw_vsock vsock: split dwork to avoid reinitializations 2018-08-07 12:39:13 -07:00
wimax wimax: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
wireless nl80211: Add per peer statistics to compute FCS error rate 2018-10-12 12:56:34 +02:00
x25 x25: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
Kconfig bpf, sockmap: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
Makefile bpfilter: check compiler capability in Kconfig 2018-06-28 13:36:39 +09:00
compat.c net: avoid unnecessary sock_flag() check when enable timestamp 2018-08-06 10:42:48 -07:00
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
sysctl_net.c
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