@w0w
Seems so or possibly an interaction with if_pppoe and something else within the new beta.
Regressing to 24.11 again and symptoms vanish. Reverting to the old backend on the beta seems fine too (albeit with the old pppoe issues).
I had to work back again and re-test as I had the test diff patch applied with the revised beta, which drew some doubts on my results for a while. Fat-fingering in a config error when testing is something I try to avoid but you have to admit your mistakes.
I'm waiting for the next beta drop really, to see if the changes also impact the issues I see. Opening up all the cores may just be peeling back something that was already latent and just masked by the old backend process.
I did do a couple of tests that suggests the upload fq_codel settings may need adjusting against a different workload for if_pppoe; but too early to be sure.
I'm also being nudged to try Kea again, as apparently it has matured a bit since its launch.
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