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Eric Dumazet 2e5f421211 tcp: frto should not set snd_cwnd to 0 
Commit 9dc274151a (tcp: fix ABC in tcp_slow_start())
uncovered a bug in FRTO code :
tcp_process_frto() is setting snd_cwnd to 0 if the number
of in flight packets is 0.

As Neal pointed out, if no packet is in flight we lost our
chance to disambiguate whether a loss timeout was spurious.

We should assume it was a proper loss.

Reported-by: Pasi Kärkkäinen <pasik@iki.fi>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-03 16:00:25 -05:00
..
9p
802
8021q 8021q: fix vlan device to inherit the unicast filtering capability flag 2012-11-30 12:07:27 -05:00
appletalk
atm atm: use scnprintf() instead of sprintf() 2012-12-17 20:50:51 -08:00
ax25
batman-adv batman-adv: filter ARP packets with invalid MAC addresses in DAT 2013-01-27 14:02:39 +01:00
bluetooth Bluetooth: Check if the hci connection exists in SCO shutdown 2013-01-10 03:53:32 -02:00
bridge bridge: add empty br_mdb_init() and br_mdb_uninit() definitions. 2013-01-03 03:35:22 -08:00
caif caif_usb: Make the driver name check more efficient 2012-12-09 00:34:02 -05:00
can Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2013-01-02 17:32:49 -08:00
core pktgen: correctly handle failures when adding a device 2013-01-29 15:43:03 -05:00
dcb net: Allow DCBnl to use other namespaces besides init_net 2012-12-10 14:09:01 -05:00
dccp inet: Fix kmemleak in tcp_v4/6_syn_recv_sock and dccp_v4/6_request_recv_sock 2012-12-14 13:14:07 -05:00
decnet net: Push capable(CAP_NET_ADMIN) into the rtnl methods 2012-11-18 20:32:44 -05:00
dns_resolver Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2012-12-16 15:40:50 -08:00
dsa dsa: Hide core config options; make drivers select what they need 2012-11-26 17:10:44 -05:00
ethernet
ieee802154 6lowpan: consider checksum bytes in fragmentation threshold 2012-11-30 12:19:24 -05:00
ipv4 tcp: frto should not set snd_cwnd to 0 2013-02-03 16:00:25 -05:00
ipv6 ipv6: export ip6_datagram_recv_ctl 2013-01-31 13:53:08 -05:00
ipx
irda TTY/Serial merge for 3.8-rc1 2012-12-11 14:08:47 -08:00
iucv s390/irq: remove split irq fields from /proc/stat 2013-01-08 10:57:07 +01:00
key net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
l2tp l2tp: correctly handle ancillary data in the ip6 recv path 2013-01-31 13:53:09 -05:00
lapb
llc net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
mac80211 mac80211: add encrypt headroom to PERR frames 2013-01-16 23:24:51 +01:00
mac802154 mac802154: fix NOHZ local_softirq_pending 08 warning 2013-01-04 13:47:21 -08:00
netfilter netfilter: x_tables: print correct hook names for ARP 2013-01-13 12:54:12 +01:00
netlabel
netlink netlink: validate addr_len on bind 2012-12-17 20:50:51 -08:00
netrom
nfc nfc: remove noisy message from llcp_sock_sendmsg 2012-12-13 12:58:10 -05:00
openvswitch openvswitch: Use RCU callback when detaching netdevices. 2012-11-28 14:04:34 -08:00
packet net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm 2012-11-18 20:32:45 -05:00
phonet net: Push capable(CAP_NET_ADMIN) into the rtnl methods 2012-11-18 20:32:44 -05:00
rds IB/rds: suppress incompatible protocol when version is known 2012-12-26 15:17:37 -08:00
rfkill Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
rose
rxrpc
sched netem: fix delay calculation in rate extension 2013-01-29 15:43:02 -05:00
sctp SCTP: Free the per-net sysctl table on net exit. v2 2013-01-28 00:09:32 -05:00
sunrpc ipv6: rename datagram_send_ctl and datagram_recv_ctl 2013-01-31 13:53:08 -05:00
tipc tipc: refactor accept() code for improved readability 2012-12-07 17:23:24 -05:00
unix net: Don't export sysctls to unprivileged users 2012-11-18 20:30:55 -05:00
wanrouter
wimax
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2013-02-01 13:43:25 -05:00
x25
xfrm xfrm: fix freed block size calculation in xfrm_policy_fini() 2013-01-21 06:50:04 +01:00
compat.c
Kconfig
Makefile ipv6: Preserve ipv6 functionality needed by NET 2012-11-18 02:34:00 -05:00
nonet.c
socket.c
sysctl_net.c user_ns: get rid of duplicate code in net_ctl_permissions 2012-11-18 20:32:45 -05:00