From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] tcp: Remove tcp_low_latency sysctl.
Date: Tue, 12 Dec 2017 09:49:53 -0500 (EST)
Message-ID: <20171212.094953.265369420292062485.davem@davemloft.net>
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From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Date: Tue, 12 Dec 2017 06:43:08 -0800

> The prequeue has been removed from the kernel. If we leave
> the tcp_low_latency in kernel, it may confuse the users.
> If users can't find the option, the doc may tell them why.
> So we remove also the sysctl about tcp_low_latency.
> 
> Signed-off-by: Tonghao Zhang <zhangtonghao@didichuxing.com>

If you remove the sysctl, it will break scripts.

That's why we left it around.