kernel_optimize_test/net
Andrei Pelinescu-Onciul 5fdd4baef6 sctp: on T3_RTX retransmit all the in-flight chunks
When retransmitting due to T3 timeout, retransmit all the
in-flight chunks for the corresponding  transport/path, including
chunks sent less then 1 rto ago.
This is the correct behaviour according to rfc4960 section 6.3.3
E3 and
"Note: Any DATA chunks that were sent to the address for which the
 T3-rtx timer expired but did not fit in one MTU (rule E3 above)
 should be marked for retransmission and sent as soon as cwnd
 allows (normally, when a SACK arrives). ".

This fixes problems when more then one path is present and the T3
retransmission of the first chunk that timeouts stops the T3 timer
for the initial active path, leaving all the other in-flight
chunks waiting forever or until a new chunk is transmitted on the
same path and timeouts (and this will happen only if the cwnd
allows sending new chunks, but since cwnd was dropped to MTU by
the timeout => it will wait until the first heartbeat).

Example: 10 packets in flight, sent at 0.1 s intervals on the
primary path. The primary path is down and the first packet
timeouts. The first packet is retransmitted on another path, the
T3 timer for the primary path is stopped and cwnd is set to MTU.
All the other 9 in-flight packets will not be retransmitted
(unless more new packets are sent on the primary path which depend
on cwnd allowing it, and even in this case the 9 packets will be
retransmitted only after a new packet timeouts which even in the
best case would be more then RTO).

This commit reverts d0ce92910b and
also removes the now unused transport->last_rto, introduced in
 b6157d8e03.

p.s  The problem is not only when multiple paths are there.  It
can happen in a single homed environment.  If the application
stops sending data, it possible to have a hung association.

Signed-off-by: Andrei Pelinescu-Onciul <andrei@iptel.org>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-29 00:14:02 -08:00
..
9p 9p: fix readdir corner cases 2009-11-02 08:43:45 -06:00
802 net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
8021q vlan: Fix register_vlan_dev() error path 2009-11-17 06:45:04 -08:00
appletalk Have atalk_route_packet() return NET_RX_SUCCESS not NET_XMIT_SUCCESS 2009-09-14 17:02:47 -07:00
atm net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ax25 ax25: Fix possible oops in ax25_make_new 2009-09-30 16:44:12 -07:00
bluetooth Bluetooth: Fix regression with L2CAP configuration in Basic Mode 2009-11-16 01:31:41 +01:00
bridge bridge: prevent bridging wrong device 2009-11-05 20:46:52 -08:00
can can: should not use __dev_get_by_index() without locks 2009-11-08 00:33:43 -08:00
core pktgen: Fix netdevice unregister 2009-11-24 14:50:53 -08:00
dcb net: fix double skb free in dcbnl 2009-09-26 20:16:15 -07:00
dccp net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
decnet decnet: netdevice refcount leak 2009-11-06 00:50:39 -08:00
dsa netdev: convert pseudo-devices to netdev_tx_t 2009-09-01 01:13:07 -07:00
econet Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
ethernet net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
ieee802154 net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipv4 ipmr: missing dev_put() on error path in vif_add() 2009-11-13 19:56:54 -08:00
ipv6 net: fix sk_forward_alloc corruption 2009-10-30 12:25:12 -07:00
ipx net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
irda headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
iucv net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
key net: file_operations should be const 2009-09-02 01:03:53 -07:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2009-11-23 14:01:47 -08:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6 2009-11-23 09:52:51 -08:00
netlabel Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-07-30 19:22:43 -07:00
netlink net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
netrom net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-29 09:22:08 -07:00
phonet Phonet: fix mutex imbalance 2009-09-30 16:41:34 -07:00
rds net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
rfkill Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2009-11-23 14:01:47 -08:00
rose rose: device refcount leak 2009-11-05 20:56:07 -08:00
rxrpc net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
sched pkt_sched: pedit use proper struct 2009-10-11 23:03:47 -07:00
sctp sctp: on T3_RTX retransmit all the in-flight chunks 2009-11-29 00:14:02 -08:00
sunrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-11-03 07:44:01 -08:00
tipc net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
unix AF_UNIX: Fix deadlock on connecting to shutdown socket 2009-10-18 23:17:37 -07:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax wimax: fix warning caused by not checking retval of rfkill_set_hw_state() 2009-06-11 11:12:48 -07:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-11-03 07:44:01 -08:00
x25 net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
xfrm net: file_operations should be const 2009-09-02 01:03:53 -07:00
compat.c net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
Kconfig net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
Makefile net: remove redundant sched/ in net/Makefile 2009-07-12 20:11:14 -07:00
nonet.c
socket.c net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
TUNABLE