Jonas Mårtensson <martensson.jonas@gmail.com> wrote:
    > Speaking about systemd defaults, they just enabled ecn for outgoing
    > connections:

    > https://github.com/systemd/systemd/pull/9143

What about PLPMTU?  Do you think they might tweak that too?

     net.ipv4.tcp_mtu_probing=2
     (despite name, applies to IPv6 too)

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