[PATCH net-next 0/5] mptcp: out-of-order queue pruning
"Matthieu Baerts (NGI0)" <[email protected]> Fri, 24 Jul 2026 16:02:12 +0200
| Newsgroups | dev.linux.lists.mptcp,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <20260724-net-next-mptcp-oooq-pruning-v1-0-5dd4dec63a54@kernel.org> |
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) <[email protected]> --- 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) <[email protected]>