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

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Message-ID: <8fd45611-1551-4858-89b5-a3b26505bb00@redhat.com>
Date: Tue, 2 Dec 2025 13:01:26 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: Mariusz Klimek <maklimek97@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] selftests/net: remove unnecessary MTU config
 in big_tcp.sh

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