linux-kernel - Re: [PATCH net-next 2/3] net: ethernet: am65-cpsw: Set default TX channels to maximum

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Date:   Tue, 14 Nov 2023 22:16:45 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, s-vadapalli@...com, r-gunasekaran@...com,
        srk@...com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pekka Varis <p-varis@...com>
Subject: Re: [PATCH net-next 2/3] net: ethernet: am65-cpsw: Set default TX
 channels to maximum

On 14/11/2023 14:13, Vladimir Oltean wrote:
> On Mon, Nov 13, 2023 at 01:07:07PM +0200, Roger Quadros wrote:
>> am65-cpsw supports 8 TX hardware queues. Set this as default.
> 
> Motivation? Drawbacks / reasons why this was not done from the beginning?

Motivation was to get the "kselftest -t net/forwarding:ethtool_mm.sh" test to work
without requiring additional manual step of increasing the TX channels.

Another issue is that all network interfaces (can be up to 4 on some devices) have to be
brought down if TX channel count needs to change.

I am not aware why this was not done from the beginning.

-- 
cheers,
-roger