Subject: Re: [PATCH net v2] selftests/net: fix out-of-order delivery of FIN in gro:tcp test

From: Willem de Bruijn <[email-masked]>
Date: Thu, 30 Oct 2025 08:26:51 -0400

Anubhav Singh wrote:
> Due to the gro_sender sending data packets and FIN packets
> in very quick succession, these are received almost simultaneously
> by the gro_receiver. FIN packets are sometimes processed before the
> data packets leading to intermittent (~1/100) test failures.
> 
> This change adds a delay of 100ms before sending FIN packets
> in gro:tcp test to avoid the out-of-order delivery. The same
> mitigation already exists for the gro:ip test.
> 
> Fixes: 7d1575014a63 ("selftests/net: GRO coalesce test")
> Reviewed-by: Willem de Bruijn <[email-masked]>
> Signed-off-by: Anubhav Singh <[email-masked]>
> ---
> Changes in v2:
>  - Add 'Shuah Khan <[email-masked]>' to the CC list.

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