linux-kernel - Re: [PATCH net-next 03/10] devlink: Serialize access to rate domains

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Message-ID: <20250226185310.42305482@kernel.org>
Date: Wed, 26 Feb 2025 18:53:10 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Jiri Pirko <jiri@...nulli.us>
Cc: Tariq Toukan <tariqt@...dia.com>, "David S. Miller"
 <davem@...emloft.net>, Paolo Abeni <pabeni@...hat.com>, Eric Dumazet
 <edumazet@...gle.com>, Andrew Lunn <andrew+netdev@...n.ch>, Jiri Pirko
 <jiri@...dia.com>, Cosmin Ratiu <cratiu@...dia.com>, Carolina Jubran
 <cjubran@...dia.com>, Gal Pressman <gal@...dia.com>, Mark Bloch
 <mbloch@...dia.com>, Donald Hunter <donald.hunter@...il.com>, Jonathan
 Corbet <corbet@....net>, Saeed Mahameed <saeedm@...dia.com>, Leon
 Romanovsky <leon@...nel.org>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-rdma@...r.kernel.org
Subject: Re: [PATCH net-next 03/10] devlink: Serialize access to rate
 domains

On Wed, 26 Feb 2025 15:44:35 +0100 Jiri Pirko wrote:
> > Why would there still be PF instances? I'm not suggesting that you
> > create a hierarchy of instances.  
> 
> I'm not sure how you imagine getting rid of them. One PCI PF
> instantiates one devlink now. There are lots of configuration (e.g. params)
> that is per-PF. You need this instance for that, how else would you do
> per-PF things on shared ASIC instance?

There are per-PF ports, right?

> Creating SFs is per-PF operation for example. I didn't to thorough
> analysis, but I'm sure there are couple of per-PF things like these.

Seems like adding a port attribute to SF creation would be a much
smaller extension than adding a layer of objects.

> Also not breaking the existing users may be an argument to keep per-PF
> instances.

We're talking about multi-PF devices only. Besides pretty sure we 
moved multiple params and health reporters to be per port, so IDK 
what changed now.