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

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Message-ID: <1460126665.6473.437.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Fri, 08 Apr 2016 07:44:25 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yang Yingliang <yangyingliang@...wei.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	Ding Tianhong <dingtianhong@...wei.com>
Subject: Re: [PATCH RFC] net: decrease the length of backlog queue
 immediately after it's detached from sk

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.