netdev - Re: [PATCH net-next 00/14] mlxsw: Shared buffer improvements

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Message-ID: <20190423072802.GD2677@nanopsycho.orion>
Date:   Tue, 23 Apr 2019 09:28:02 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Ido Schimmel <idosch@...lanox.com>
Cc:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>,
        Petr Machata <petrm@...lanox.com>,
        Alex Kushnarov <alexanderk@...lanox.com>,
        mlxsw <mlxsw@...lanox.com>
Subject: Re: [PATCH net-next 00/14] mlxsw: Shared buffer improvements

Tue, Apr 23, 2019 at 07:26:06AM CEST, idosch@...lanox.com wrote:
>On Mon, Apr 22, 2019 at 02:17:39PM -0700, Jakub Kicinski wrote:
>> Out of curiosity - are you guys considering adding CPU flavour ports,
>> or is there a good reason not to have it exposed?
>
>Yes, we are considering that. In fact, Alexander (Cc-ed) just asked me if
>it is possible to monitor the occupancy in the egress CPU pool. This is
>impossible without exposing the CPU port and it would have saved us a
>lot of time while debugging these issues.
>
>Do you need this functionality for nfp as well? If so, do you have any
>thoughts about it? My thinking is that it would be a devlink port
>without a backing netdev.

Similar to CPU port in DSA. It also does not have netdev associated with
it. We can use the same port flavour:
DEVLINK_PORT_FLAVOUR_CPU