linux-kernel - Re: [PATCH net-next v2] net: stmmac: est: Drop frames causing HLBS error

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Message-ID: <071bc895-b26b-4f78-91c7-fd6d53a11e11@altera.com>
Date: Thu, 18 Sep 2025 07:50:59 +0530
From: "G Thomas, Rohan" <rohan.g.thomas@...era.com>
To: Jakub Kicinski <kuba@...nel.org>,
 Rohan G Thomas via B4 Relay <devnull+rohan.g.thomas.altera.com@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Maxime Coquelin
 <mcoquelin.stm32@...il.com>, Alexandre Torgue
 <alexandre.torgue@...s.st.com>, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Matthew Gerlach <matthew.gerlach@...era.com>
Subject: Re: [PATCH net-next v2] net: stmmac: est: Drop frames causing HLBS
 error

Hi Jakub,

Thanks for reviewing the patch.

On 9/18/2025 4:03 AM, Jakub Kicinski wrote:
> On Mon, 15 Sep 2025 16:22:14 +0800 Rohan G Thomas via B4 Relay wrote:
>> From: Rohan G Thomas <rohan.g.thomas@...era.com>
>>
>> Drop those frames causing HLBS error to avoid HLBS interrupt
>> flooding and netdev watchdog timeouts due to blocked packets.
>> Also add HLBS frame drops to taprio stats.
> 
> I think these should be two separate commits.

Sure, I will do in the next version.

> 
> Also are the HLBS and DFBS acronyms obvious to everyone who works
> on TSN?

Even though the term Head-Of-Line Blocking is obvious, the acronyms HLBS
and DFBS are from the dwmac and dwxgmac databooks.

HLBS => Head-Of-Line Blocking due to Scheduling
DFBS => Drop Frames causing Scheduling Error

I’ll expand these acronyms in the next version for clarity.

Best Regards,
Rohan