netdev - Re: [Intel-wired-lan] [PATCH iwl-next v4 4/5] ice: Add tx_scheduling

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Message-ID: <20240221153805.20fbaf47@kernel.org>
Date: Wed, 21 Feb 2024 15:38:05 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Jiri Pirko <jiri@...nulli.us>
Cc: Mateusz Polchlopek <mateusz.polchlopek@...el.com>,
 intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org, horms@...nel.org,
 przemyslaw.kitszel@...el.com, Lukasz Czapnik <lukasz.czapnik@...el.com>
Subject: Re: [Intel-wired-lan] [PATCH iwl-next v4 4/5] ice: Add
 tx_scheduling_layers devlink param

On Mon, 19 Feb 2024 13:37:36 +0100 Jiri Pirko wrote:
> >devlink dev param show pci/0000:4b:00.0 name tx_scheduling_layers
> >pci/0000:4b:00.0:
> >  name tx_scheduling_layers type driver-specific
> >    values:
> >      cmode permanent value 9
> >
> >Set:
> >devlink dev param set pci/0000:4b:00.0 name tx_scheduling_layers value 5
> >cmode permanent  

It's been almost a year since v1 was posted, could you iterate quicker? :( 

> This is kind of proprietary param similar to number of which were shot
> down for mlx5 in past. Jakub?

I remain somewhat confused about what this does.
Specifically IIUC the problem is that the radix of each node is
limited, so we need to start creating multi-layer hierarchies 
if we want a higher radix. Or in the "5-layer mode" the radix 
is automatically higher?