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Date:   Tue, 25 Aug 2020 17:32:03 -0700
From:   Jakub Kicinski <>
To:     Parav Pandit <>
Cc:,,,, Jiri Pirko <>
Subject: Re: [PATCH net-next 2/3] devlink: Consider other controller while
 building phys_port_name

On Tue, 25 Aug 2020 16:58:38 +0300 Parav Pandit wrote:
> A devlink port may be for a controller consist of PCI device.
> A devlink instance holds ports of two types of controllers.
> (1) controller discovered on same system where eswitch resides
> This is the case where PCI PF/VF of a controller and devlink eswitch
> instance both are located on a single system.
> (2) controller located on other system.
> This is the case where a controller is located in one system and its
> devlink eswitch ports are located in a different system. In this case
> devlink instance of the eswitch only have access to ports of the
> controller.
> When a devlink eswitch instance serves the devlink ports of both
> controllers together, PCI PF/VF numbers may overlap.
> Due to this a unique phys_port_name cannot be constructed.

This description is clear as mud to me. Is it just me? Can someone
understand this?

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