This patch set prevents TCP sender from using RTT samples from (suspected) delayed ACKs as the minimum RTT, to avoid unbounded over-estimation of the network path delay. This issue is common when a connection has extended periods of one packet chit-chat beyond the min RTT filter window. The first patch does that for TCP general min RTT estimation. The second patch addresses specifically the BBR congestion control's min RTT filter.
Yuchung Cheng (2): tcp: avoid min-RTT overestimation from delayed ACKs tcp: avoid min RTT bloat by skipping RTT from delayed-ACK in BBR include/net/tcp.h | 1 + net/ipv4/tcp_bbr.c | 3 ++- net/ipv4/tcp_input.c | 24 ++++++++++++++++++++++-- 3 files changed, 25 insertions(+), 3 deletions(-) -- 2.16.0.rc1.238.g530d649a79-goog
