netdev - Re: ingress rate limiting on mv88e6xxx

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Message-ID: <20200330160103.22755244@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Mon, 30 Mar 2020 16:01:03 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        Andrew Lunn <andrew@...n.ch>
Cc:     Network Development <netdev@...r.kernel.org>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: ingress rate limiting on mv88e6xxx

On Mon, 30 Mar 2020 15:22:44 +0200 Rasmus Villemoes wrote:
> I'm trying to figure out what the proper way is to expose the ingress
> rate limiting knobs of the mv88e6250 (and related) to userspace. The
> simpest seems to be a set of sysfs files for each port, but I'm assuming
> that's a no-go (?)

Out of curiosity - is this policing (i.e. dropping)?  Are there any
switches out there which would generate pause frames if port / priority
is above a certain threshold?