From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Subject: Re: Force ACK each received tcp segment under no condition
Date: Sat, 25 Jan 2014 00:25:47 +0100
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To: Vincent Li <vincent.mc.li@gmail.com>
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On Fri, Jan 24, 2014 at 03:18:19PM -0800, Vincent Li wrote:
> I know this sounds really silly, but I would like to do such test to
> meet my curiosity. is that all I need to do?

Isn't quick ack mode what you're looking for (bcefe17cffd "tcp:
introduce a per-route knob for quick ack"), also settable per setsockopt
TCP_QUICKACK?

Greetings,

  Hannes