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Date:   Wed, 13 Jan 2021 19:25:52 -0800
From:   Jakub Kicinski <>
To:     Vladimir Oltean <>
Cc:     "David S. Miller" <>,,,,,,,,,,,,
Subject: Re: [PATCH v4 net-next 00/10] Configuring congestion watermarks on
 ocelot switch using devlink-sb

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.

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