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ipxe/src/net
Michael Brown c117b25e0b [tcp] Do not shrink window when discarding received packets
We currently shrink the TCP window permanently if we are ever forced
(by a low-memory condition) to discard a previously received TCP
packet.  This behaviour was intended to reduce the number of
retransmissions in a lossy network, since lost packets might
potentially result in the entire window contents being retransmitted.

Since commit e0fc8fe ("[tcp] Implement support for TCP Selective
Acknowledgements (SACK)") the cost of lost packets has been reduced by
around one order of magnitude, and the reduction in the window size
(which affects the maximum throughput) is now the more significant
cost.

Remove the code which reduces the TCP maximum window size when a
received packet is discarded.

Reported-by: Wissam Shoukair <wissams@mellanox.com>
Tested-by: Wissam Shoukair <wissams@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
2015-06-25 10:20:48 +01:00
..
80211 [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
infiniband [base16] Add buffer size parameter to base16_encode() and base16_decode() 2015-04-24 14:41:32 +01:00
oncrpc [nfs] Rewrite NFS URI handling 2014-05-18 21:53:39 +01:00
tcp [base64] Add buffer size parameter to base64_encode() and base64_decode() 2015-04-24 15:32:04 +01:00
udp [retry] Rewrite unrelicensable portions of retry.c 2015-03-05 11:06:03 +00:00
aoe.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 16:35:29 +00:00
arp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 16:35:29 +00:00
dhcpopts.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:50:42 +00:00
dhcppkt.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
eapol.c [legal] Update FSF mailing address in GPL licence texts 2012-07-20 19:55:45 +01:00
eth_slow.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 16:35:29 +00:00
ethernet.c [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
fakedhcp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
fc.c [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
fcels.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
fcns.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
fcoe.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
fcp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
fragment.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
icmp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
icmpv4.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
icmpv6.c [ipv6] Disambiguate received ICMPv6 errors 2015-05-11 12:45:14 +01:00
infiniband.c [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
iobpad.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
ipv4.c [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
ipv6.c [build] Fix the REQUIRE_SYMBOL mechanism 2015-03-05 00:59:38 +00:00
ndp.c [ipv6] Do not set sin6_scope_id on source address 2014-05-23 14:11:17 +01:00
neighbour.c [neighbour] Return success when deferring a packet 2015-05-20 15:29:36 +01:00
netdev_settings.c [netdevice] Add missing bus types to netdev_fetch_bustype() 2015-03-18 16:42:39 +00:00
netdevice.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 16:35:29 +00:00
nullnet.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
pccrc.c [base16] Add buffer size parameter to base16_encode() and base16_decode() 2015-04-24 14:41:32 +01:00
ping.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
rarp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
retry.c [retry] Colourise debug output 2015-03-05 11:25:54 +00:00
rndis.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
socket.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 14:17:31 +00:00
tcp.c [tcp] Do not shrink window when discarding received packets 2015-06-25 10:20:48 +01:00
tcpip.c [tcpip] Fix dubious calculation of min_port 2015-03-13 10:19:44 +00:00
tls.c [build] Add missing "const" qualifiers 2015-04-24 13:03:28 +01:00
udp.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-02 16:35:29 +00:00
validator.c [base64] Add buffer size parameter to base64_encode() and base64_decode() 2015-04-24 15:32:04 +01:00
vlan.c [legal] Relicense files under GPL2_OR_LATER_OR_UBDL 2015-03-05 11:40:13 +00:00