netdev - Re: [PATCH net-next 3/3] selftests/net: remove unnecessary MTU config in big

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Message-ID: <1dba15b8-64e8-4ed6-b3d3-9bfabacd2d1b@gmail.com>
Date: Tue, 2 Dec 2025 17:46:58 +0100
From: Mariusz Klimek <maklimek97@...il.com>
To: Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] selftests/net: remove unnecessary MTU config
 in big_tcp.sh

On 12/2/25 13:01, Paolo Abeni wrote:
> On 11/27/25 10:13 AM, Mariusz Klimek wrote:
>> This patch removes the manual lowering of the client MTU in big_tcp.sh. The
>> MTU lowering was previously required as a work-around due to a bug in the
>> MTU validation of BIG TCP jumbograms. The MTU was lowered to 1442, but note
>> that 1492 (1500 - 8) would of worked just as well. Now that the bug has
>> been fixed, the manual client MTU modification can be removed entirely.
>>
>> Signed-off-by: Mariusz Klimek <maklimek97@...il.com>
> 
> While touching this self-tests, I think it would be nice to additionally
> add the 'negative' case, i.e. egress mtu lower than ingress and bit tcp
> segmentation taking place.
> 
> /P
> 

Good idea. I'll update the tests.

-- 
Mariusz K.