linux-kernel - Re: [RFC PATCH 2/2] softirq: Drop the warning from do_softirq_post_smp_call

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Message-ID: <20230816152216.Gc_KwqZq@linutronix.de>
Date:   Wed, 16 Aug 2023 17:22:16 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Jesper Dangaard Brouer <hawk@...nel.org>
Cc:     netdev@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wander Lairson Costa <wander@...hat.com>,
        linux-kernel@...r.kernel.org,
        kernel-team <kernel-team@...udflare.com>,
        Yan Zhai <yan@...udflare.com>
Subject: Re: [RFC PATCH 2/2] softirq: Drop the warning from
 do_softirq_post_smp_call_flush().

On 2023-08-16 16:48:56 [+0200], Jesper Dangaard Brouer wrote:
> I'm no expert in sched / softirq area of the kernel, but I'm willing to help
> out testing different solution that can regain the "overload" protection
> e.g. avoid packet processing "falls-of-an-edge" (and thus opens the kernel
> to be DDoS'ed easily).
> Is this what Sebastian's patchset does?

I was going to respond but didn't know what so far.
Can you figure out if you are using backlog or not. If you do, could try
my patch. If not could you try to enable napi-thread and see?
Either way I will re-read it again.

Sebastian