Re: [PATCH v3 mptcp-next 00/10] mptcp: address stall under memory pressure

[Matthieu Baerts <matttbe@kernel.org>]

Hi Geliang, Gang,

On 04/05/2026 17:39, Paolo Abeni wrote:
> This an attempt to fix the data transfer stall reported by Geliang and
> Gang more carefully enforcing memory constraints at the MPTCP level.
> 
> Patch 1/10 moves the bound check before entering the TCP socket.
> Patch 2, 3, 4 and 5 are cleanups/refactors finalized to safely re-using
> TCP helpers on MPTCP skbs.
> Patch 6 makes TCP pruning related helpers available to MPTCP and patch 7
> makes use of them. Patch 8 addresses an edge scenario that could still
> lead to transfer stall under memory pressure.
> Finally patch 9 and 10 improve the MPTCP-level retransmission schema to
> make recovery from memory pressure significanly faster.
> 
> Note that the diffstat is biases by the quite large patch 4/9, which
> contains mechanical transformation of existing code; "real" changes are
> noticiable smaller.
> 
> Tested successfully vs the test cases proposed by Geliang and Gang and
> vs the selftests.

At the last meeting on Wednesday, Geliang mentioned he validated this
series. Just to be sure, was it the v2 -- from last week -- or the v3 --
from this week, while you were in EU -- that you validated? Because
Paolo couldn't reproduce the issue you mentioned on the v3 on his side.

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.