Under memory pressure, a pruning of the MPTCP-level OoO queue might be
required as last resort, to avoid too long recoveries, or even stalls.
Geliang and Gang managed to reproduce this behaviour, and Paolo
improved the situation thanks to the following patches:
- Patches 1-2: improve the MPTCP-level retransmission schema to make
recoveries from memory pressure/after MPTCP-level drop significantly
faster.
- Patches 2-3: make the admission check way stricter for incoming
packets exceeding the memory limits, with some exceptions for fallback
sockets.
- Patch 5: implement OoO queue pruning for MPTCP.
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
Paolo Abeni (5):
mptcp: move the retrans loop to a separate helper
mptcp: let the retrans scheduler do its job
mptcp: explicitly drop over memory limits
mptcp: enforce hard limit on backlog flushing
mptcp: implemented OoO queue pruning
net/mptcp/mib.c | 3 +
net/mptcp/mib.h | 3 +
net/mptcp/options.c | 28 +++++-
net/mptcp/protocol.c | 251 +++++++++++++++++++++++++++++++++++++--------------
4 files changed, 215 insertions(+), 70 deletions(-)
---
base-commit: 89d8006259b81dd25c962f6cc8d7ab268d6ea426
change-id: 20260724-net-next-mptcp-oooq-pruning-48566d10dbd0
Best regards,
--
Matthieu Baerts (NGI0) <matttbe@kernel.org>