Yuchung Cheng 59c9af4234 tcp: measure RTT from new SACK ... Take RTT sample if an ACK selectively acks some sequences that have never been retransmitted. The Karn's algorithm does not apply even if that ACK (s)acks other retransmitted sequences, because it must been generated by an original but perhaps out-of-order packet. There is no ambiguity. In case when multiple blocks are newly sacked because of ACK losses the earliest block is used to measure RTT, similar to cummulative ACKs. Such RTT samples allow the sender to estimate the RTO during loss recovery and packet reordering events. It is still useful even with TCP timestamps. That's because during these events the SND.UNA may not advance preventing RTT samples from TS ECR (thus the FLAG_ACKED check before calling tcp_ack_update_rtt()). Therefore this new RTT source is complementary to existing ACK and TS RTT mechanisms. This patch does not update the RTO. It is done in the next patch. Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-07-22 17:53:42 -07:00
..
9p	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-13 17:42:22 -07:00
802	net/802/mrp: fix lockdep splat	2013-05-14 13:02:30 -07:00
8021q	vlan: fix a race in egress prio management	2013-07-18 13:07:13 -07:00
appletalk	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
atm	net: always pass struct netdev_notifier_info to netdevice notifiers	2013-05-28 21:58:54 -07:00
ax25	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
batman-adv	net: Unmap fragment page once iterator is done	2013-06-24 01:46:01 -07:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
bridge	bridge: fix some kernel warning in multicast timer	2013-07-06 18:12:47 -07:00
caif	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
can	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ceph	libceph: call r_unsafe_callback when unsafe reply is received	2013-07-03 15:32:58 -07:00
core	net: Provide a generic socket error queue delivery method for Tx time stamps.	2013-07-22 14:58:19 -07:00
dcb
dccp
decnet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
dns_resolver	net: strict_strtoul is obsolete, use kstrtoul instead	2013-07-12 16:09:14 -07:00
dsa
ethernet	net: Fix sysfs_format_mac() code duplication.	2013-07-16 17:09:22 -07:00
ieee802154	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ipv4	tcp: measure RTT from new SACK	2013-07-22 17:53:42 -07:00
ipv6	tcp: consolidate SYNACK RTT sampling	2013-07-22 17:53:42 -07:00
ipx	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
irda	net/irda: fixed style issues in irttp	2013-07-19 17:34:40 -07:00
iucv	net: delete __cpuinit usage from all net files	2013-07-14 19:36:58 -04:00
key	af_key: fix info leaks in notify messages	2013-06-26 15:15:54 -07:00
l2tp	l2tp: make datapath resilient to packet loss when sequence numbers enabled	2013-07-02 16:33:25 -07:00
lapb
llc
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-04-30 03:55:20 -04:00
mpls	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-03 14:55:13 -07:00
netlabel	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
netlink	netlink: fix splat in skb_clone with large messages	2013-06-27 22:44:16 -07:00
netrom	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
nfc	NFC: llcp: Fix the well known services endianness	2013-06-14 13:45:10 +02:00
openvswitch	openvswitch: Add Kconfig dependency on GRE-DEMUX.	2013-07-01 13:19:43 -07:00
packet	net: Provide a generic socket error queue delivery method for Tx time stamps.	2013-07-22 14:58:19 -07:00
phonet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rds	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rfkill	Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next	2013-04-22 14:58:14 -04:00
rose	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rxrpc
sched	pkt_sched: sch_qfq: remove a source of high packet delay/jitter	2013-07-18 13:02:00 -07:00
sctp	net: sctp: confirm route during forward progress	2013-07-09 12:49:56 -07:00
sunrpc	Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux	2013-07-17 13:43:55 -07:00
tipc	net/tipc: use %*phC to dump small buffers in hex form	2013-07-11 17:03:36 -07:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
vmw_vsock	VSOCK: Fix VSOCK_HASH and VSOCK_CONN_HASH	2013-06-23 23:51:48 -07:00
wimax
wireless	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem	2013-06-28 13:18:21 -04:00
x25	x25: Fix broken locking in ioctl error paths.	2013-07-01 18:15:25 -07:00
xfrm	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2013-06-26 13:23:13 -07:00
compat.c	net: Unbreak compat_sys_{send,recv}msg	2013-06-06 11:52:14 -07:00
Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
Makefile	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
nonet.c
socket.c	net: rename busy poll socket op and globals	2013-07-10 17:08:27 -07:00
sysctl_net.c