From: Eric Dumazet <eric.duma...@gmail.com> Date: Fri, 08 Apr 2016 07:44:25 -0700
> 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. I'm honestly beginning to suspect a bug in their driver and how they handle skb->truesize. Yang, until you show us the driver you are using and how is handles receive packets, we are largely in the dark about a major component of this issue and that is entirely unfair to us.
