This patch series is a bug fix for a TCP loss recovery performance bug
reported independently in recent netdev threads:
(i) July 26, 2017: netdev thread "TCP fast retransmit issues"
(ii) July 26, 2017: netdev thread:
"[PATCH V2 net-next] TLP: Don't reschedule PTO when there's one
outstanding TLP retransmission"
Many thanks to Klavs Klavsen and Mao Wenan for the detailed reports,
traces, and packetdrill test cases, which enabled us to root-cause
this issue and verify the fix.
Neal Cardwell (3):
tcp: introduce tcp_rto_delta_us() helper for xmit timer fix
tcp: enable xmit timer fix by having TLP use time when RTO should fire
tcp: fix xmit timer to only be reset if data ACKed/SACKed
include/net/tcp.h | 10 ++++++++++
net/ipv4/tcp_input.c | 30 +++++++++++++++++-------------
net/ipv4/tcp_output.c | 21 ++++-----------------
3 files changed, 31 insertions(+), 30 deletions(-)
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2.14.0.rc0.400.g1c36432dff-goog
