From: "Kevin(Yudong) Yang" <y...@google.com>
This series includes two minor bug fixes for the TCP BBR PROBE_RTT
mechanism, and one preparatory patch:
(1) A preparatory patch to reorganize the PROBE_RTT logic by refactoring
(into its own function) the code to exit PROBE_RTT, since the next
patch will be using that code in a new context.
(2) Fix: When BBR restarts from idle and if BBR is in PROBE_RTT mode,
BBR should check if it's time to exit PROBE_RTT. If yes, then BBR
should exit PROBE_RTT mode and restore the cwnd to its full value.
(3) Fix: Apply the PROBE_RTT cwnd cap even if the count of fully-ACKed
packets is 0.
Kevin Yang (3):
tcp_bbr: add bbr_check_probe_rtt_done() helper
tcp_bbr: in restart from idle, see if we should exit PROBE_RTT
tcp_bbr: apply PROBE_RTT cwnd cap even if acked==0
net/ipv4/tcp_bbr.c | 42 ++++++++++++++++++++++++------------------
1 file changed, 24 insertions(+), 18 deletions(-)
--
2.18.0.1017.ga543ac7ca45-goog
