This series is a follow-up the discussion ongoing here:
https://github.com/multipath-tcp/mptcp_net-next/issues/437
Daire reported several sub-optimal MPTCP behaviour on high-latency
links.
At least 3 different items stands off:
* notsent_lowat setting fooling the scheduler
* sub-optimal send buffer autotuning
* delayed acks being de-facto disabled due to subflow rcvlowat
This series is an initial attempt to address the first 2 points above.
I have a tentative patch for the 3rd, but it's nowhere near passing
the self-tests, so it will have to wait a bit.
v2 -> v3:
- avoid ingremental updates, always recompute sum(ssk->sndbuf) to avoid
drift on memory pressure/decrease
- add some needed comments
v1 -> v2:
- fixed compiler warning in patch 3/3 && more local testing
Paolo Abeni (3):
mptcp: consolidate sockopt synchronization
mptcp: ignore notsent_lowat setting at the subflow level.
mptcp: refactor sndbuf auto-tuning.
net/mptcp/protocol.c | 21 +++++++++++++----
net/mptcp/protocol.h | 54 ++++++++++++++++++++++++++++++++++++++++----
net/mptcp/sockopt.c | 28 +++++------------------
net/mptcp/subflow.c | 21 ++++++++---------
4 files changed, 82 insertions(+), 42 deletions(-)
--
2.41.0