Re: [PATCH RFC] net: decrease the length of backlog queue immediately after it's detached from sk

[Eric Dumazet]

On Fri, 2016-04-08 at 19:18 +0800, Yang Yingliang wrote:

> I expand  tcp_adv_win_scale and tcp_rmem. It has no effect.

Try :

echo -2 >/proc/sys/net/ipv4/tcp_adv_win_scale

And restart your flows.