[Devel] [PATCH hci-8.1 5/8] ms/mptcp: explicitly drop over memory limits

[no-reply at sashiko.virtuozzo.com]

> From: Paolo Abeni <pabeni at redhat.com>
> 
> Currently the enforcement of the rcvbuf constraint is implemented
> when moving the skbs into the msk receive or OoO queue, keeping the
> incoming skbs in the subflow queue when over limits.
> 
> Under significant memory pressure the above can cause permanent data
> transfer stalls, as the skb needed to make forward progress can be
> stuck in a subflow queue.
> 
> Over memory limits, drop the incoming skb, relying on MPTCP-level
> retransmissions.
> 
> Note that fallback socket must perform the limit before the skb reaches
> the subflow-level queue, as dropping an in-sequence already acked skb
> [ ... ]
> is already there.
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-153491
> Feature: fix ms/net
> Signed-off-by: Eva Kurchatova <eva.kurchatova at virtuozzo.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261106030306.16014-1-eva.kurchatova@virtuozzo.com?part=5