netdev - Question about TCP delayed-ack and PUSH flag behavior

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Message-ID: <CAPpvP8+0KftCR7WOFTf2DEOc1q_hszCHHb6pE2R-bhXMOub6Rw@mail.gmail.com>
Date: Fri, 14 Feb 2025 12:03:17 -0500
From: 제임스 <jaymaacton@...il.com>
To: netdev@...r.kernel.org
Subject: Question about TCP delayed-ack and PUSH flag behavior

Hi netdev,

When tcp stack receives a segment with PUSH flag set, does the stack
immediately send out for the corresponding ACK with ignoring delay-ack
timer?
Or regardless of the PUSH flag, delay-ack is always enforced?

Thanks,
JY