netdev - Re: [RFC Patch v5 0/5] net_sched: introduce eBPF based Qdisc

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Date:   Fri, 24 Jun 2022 10:35:36 -0700
From:   Dave Taht <dave.taht@...il.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Cong Wang <cong.wang@...edance.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>
Subject: Re: [RFC Patch v5 0/5] net_sched: introduce eBPF based Qdisc

In my world, it's inbound shaping that's the biggest problem, and my
dream has long been to somehow have a way to do:

tc qdisc add dev eth0 ingress cake bandwidth 800mbit

and that be able to work across multiple cores, without act_mirred,
without any filter magic. Getting there via ebpf as in
https://github.com/rchac/LibreQoS is working for ISPs (plea, anyone
got time to make ipv6 work there?), but it's
running out of cpu for inbound shaping on the current act_mirred path
we use that's killing us.