netdev - Re: [PATCH net 0/2] mptcp: fix 3rd ack rtx timer

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Date:   Fri, 19 Nov 2021 15:46:24 +0000 (GMT)
From:   David Miller <davem@...emloft.net>
To:     pabeni@...hat.com
Cc:     netdev@...r.kernel.org, mptcp@...ts.linux.dev, edumazet@...gle.com
Subject: Re: [PATCH net 0/2] mptcp: fix 3rd ack rtx timer

From: Paolo Abeni <pabeni@...hat.com>
Date: Fri, 19 Nov 2021 15:27:53 +0100

> Eric noted that the MPTCP code do the wrong thing to schedule
> the MPJ 3rd ack timer. He also provided a patch to address the
> issues (patch 1/2).
> 
> To fix for good the MPJ 3rd ack retransmission timer, we additionally
> need to set it after the current ack is transmitted (patch 2/2)
> 
> Note that the bug went unnotice so far because all the related
> tests required some running data transfer, and that causes
> MPTCP-level ack even on the opening MPJ subflow. We now have
> explicit packet drill coverage for this code path.

Acked-by: David S. Miller <davem@...emloft.net>