[Cake] Re: Cake Digest, Vol 131, Issue 2

[le berger des photons <thejoff@gmail.com>]

what can I read so that your well thought out message can actually make
some sense to me and I could react?

On Thu, Aug 20, 2026 at 8:02 AM <cake-request@lists.bufferbloat.net> wrote:

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>    1. Re: [PATCH net] net/sched: sch_cake: fix autorate reconfiguration
> throttling
>       (Toke Høiland-Jørgensen)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 19 Aug 2026 12:08:52 +0200
> From: Toke Høiland-Jørgensen <toke@toke.dk>
> Subject: [Cake] Re: [PATCH net] net/sched: sch_cake: fix autorate
>         reconfiguration throttling
> To: ooonea <ooonea@gmail.com>
> Cc: Jamal Hadi Salim <jhs@mojatatu.com>, Jiri Pirko
>         <jiri@resnulli.us>, "David S . Miller" <davem@davemloft.net>, Eric
>         Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,
> Paolo
>         Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
>         cake@lists.bufferbloat.net, netdev@vger.kernel.org,
>         linux-kernel@vger.kernel.org
> Message-ID: <87qzjufmmj.fsf@toke.dk>
> Content-Type: text/plain; charset=utf-8
>
> ooonea <ooonea@gmail.com> writes:
>
> > CAKE's autorate-ingress path intends to limit shaper reconfiguration to
> > once per 250 ms, but last_reconfig_time is only checked and never
> updated.
> > Since the field stays zero, every qualifying capacity-estimate window can
> > call cake_reconfigure(), causing avoidable rate churn and scheduler work
> > under bursty traffic.
> >
> > Store the current timestamp when autorate actually reconfigures the qdisc
> > so the guard enforces the intended interval.
> >
> > Fixes: 7298de9cd725 ("sch_cake: Add ingress mode")
> > Assisted-by: Codex:gpt-5.5
> > Signed-off-by: ooonea <ooonea@gmail.com>
>
> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
>
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> End of Cake Digest, Vol 131, Issue 2
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