[PATCH mptcp-next v6 0/4] mptcp: autotune related improvement

[Paolo Abeni <pabeni@redhat.com>]

This series collects a few follow-up for the backlog refactor, with some
of them posing as fixes just to confuse the enemy.

Targeting net-next as the issues addressed are very old, the change
is quite invasive and, as mentioned, based on the BL refactor.

Overall this:
- introduces a tracepoint similar to tcp useful to track down the issues
  addressed here
- avoid rx drop in corner case scenarios, improving tput stability and
  peak tput over fast link
- refactor the rcv space and rtt estimator, overall making DRS more
  correct and avoiding rcv buffer drifting to tcp_rmem[2], which in
  turn makes the tput more stable and less bursty

Note that after this upstream series will be merged:

https://patchwork.kernel.org/user/todo/netdevbpf/?series=1025209

we want to introduce similar changes in mptcp, too.
---
v5 -> v6:
  - dropped the buggy patch 3/5

v4 -> v5:
  - dropped patch 4/6; it proved to be useless together with new version
    of patch 4/5
  - refactor rtt estimator: use sliding window instead of dropping "too
    high" values

v3 -> v4:
  - dropped already merged patch 1
  - update comment in patch 6/6

v2 -> v3:
  - use __entry->family in patch 1/7
  - more verbose commit message for patch 6/7

v1 -> v2:
  - new patch 1/7
  - old patch 2/4 has been split in 3: 3/7, 4/7 and 5/7
  - refactor both the rcv space init and rtt estimator
*** SUBJECT HERE ***

*** BLURB HERE ***

Paolo Abeni (4):
  trace: mptcp: add mptcp_rcvbuf_grow tracepoint
  mptcp: fix receive space timestamp initialization.
  mptcp: better mptcp-level RTT estimator
  mptcp: add receive queue awareness in tcp_rcv_space_adjust()

 include/trace/events/mptcp.h | 80 ++++++++++++++++++++++++++++++++++
 net/mptcp/protocol.c         | 83 ++++++++++++++++++++----------------
 net/mptcp/protocol.h         | 43 ++++++++++++++++++-
 3 files changed, 169 insertions(+), 37 deletions(-)

-- 
2.51.1