netdev - Re: [PATCH net-next v2 6/6] selftests: drv-net: gro: break out all individual test cases

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Message-ID: <20260112161638.3e4f361a@kernel.org>
Date: Mon, 12 Jan 2026 16:16:38 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
 shuah@...nel.org, linux-kselftest@...r.kernel.org, sdf@...ichev.me,
 willemb@...gle.com, petrm@...dia.com
Subject: Re: [PATCH net-next v2 6/6] selftests: drv-net: gro: break out all
 individual test cases

On Sun, 11 Jan 2026 12:12:09 -0500 Willem de Bruijn wrote:
> Interesting that many devices do seem to fail some tests.

The case that convinced me to do this was TCP option handling.
Older Broadcom NICs appear to coalesce mismatched timestamps.
I suppose it may be related to the Microsoft sec which seems
to recommend coalescing incrementing timestamps like seq no :|