tcp: prefer packet timing to TS-ECR for RTT

Browse source

Prefer packet timings to TS-ecr for RTT measurements when both
sources are available. That's because broken middle-boxes and remote
peer can return packets with corrupted TS ECR fields. Similarly most
congestion controls that require RTT signals favor timing-based
sources as well. Also check for bad TS ECR values to avoid RTT
blow-ups. It has happened on production Web servers.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Yuchung Cheng 2013-07-22 16:20:46 -07:00 • committed by David S. Miller

parent 375fe02c91

commit 5b08e47caf

2 changed files with 18 additions and 50 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

include/net/tcp.h

View file

67

net/ipv4/tcp_input.c

View file