netdev - Re: [RFC PATCH net-next 05/15] net/sched: taprio: give higher priority to higher TCs in software dequeue mode

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Date:   Tue, 31 Jan 2023 10:37:47 +0100
From:   Kurt Kanzenbach <kurt@...utronix.de>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org,
        Vinicius Costa Gomes <vinicius.gomes@...el.com>
Subject: Re: [RFC PATCH net-next 05/15] net/sched: taprio: give higher
 priority to higher TCs in software dequeue mode

On Sun Jan 29 2023, Vladimir Oltean wrote:
> Anyway, I also need to be very realistic about what's possible for me to
> change and how far I'm willing to go, and Vinicius made it pretty clear
> that the existing taprio/mqprio configurations should be kept "working"
> (given an arbitrary definition of "working"). So things like adding UAPI
> for TXQ feature detection, such that an automated way of constructing
> the mqprio queue configuration, would be interesting but practically
> useless, since existing setups don't use that.
>
> He proposed to cut our losses and use the capability structure to
> conditionally keep that code in place. The resulting taprio code would
> be pretty horrible, but it might be doable.
>
> Here is a completely untested patch below, which is intended to replace
> this one. Feedback for the approach appreciated.

Yeah, I think Vinicius has to ack or nack this.

Thanks,
Kurt

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