netdev - Re: [PATCH v4 net-next 00/10] Configuring congestion watermarks on ocelot switch using devlink-sb

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Message-ID: <20210114084818.eht7qbs2grynbqrq@skbuf>
Date:   Thu, 14 Jan 2021 10:48:18 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        alexandre.belloni@...tlin.com, andrew@...n.ch,
        f.fainelli@...il.com, vivien.didelot@...il.com,
        alexandru.marginean@....com, claudiu.manoil@....com,
        xiaoliang.yang_1@....com, hongbo.wang@....com, jiri@...nulli.us,
        idosch@...sch.org, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH v4 net-next 00/10] Configuring congestion watermarks on
 ocelot switch using devlink-sb

On Wed, Jan 13, 2021 at 07:25:52PM -0800, Jakub Kicinski wrote:
> On Mon, 11 Jan 2021 19:43:06 +0200 Vladimir Oltean wrote:
> > In some applications, it is important to create resource reservations in
> > the Ethernet switches, to prevent background traffic, or deliberate
> > attacks, from inducing denial of service into the high-priority traffic.
> >
> > These patches give the user some knobs to turn. The ocelot switches
> > support per-port and per-port-tc reservations, on ingress and on egress.
> > The resources that are monitored are packet buffers (in cells of 60
> > bytes each) and frame references.
> >
> > The frames that exceed the reservations can optionally consume from
> > sharing watermarks which are not per-port but global across the switch.
> > There are 10 sharing watermarks, 8 of them are per traffic class and 2
> > are per drop priority.
> >
> > I am configuring the hardware using the best of my knowledge, and mostly
> > through trial and error. Same goes for devlink-sb integration. Feedback
> > is welcome.
>
> This no longer applies.

I was not expecting you to apply it, giving the feedback.