netdev - Re: HTB, HFSC, PIE, FIFO stuck on 2.4Gbit on default values

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Message-ID: <1446580156.23275.74.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 03 Nov 2015 11:49:16 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:	Netdev <netdev@...r.kernel.org>
Subject: Re: HTB, HFSC, PIE, FIFO stuck on 2.4Gbit on default values

On Tue, 2015-11-03 at 21:17 +0200, Denys Fedoryshchenko wrote:
>  GSO/TSO on the output and watch performance coming back.
> 
> It is not, since i have more than 120 servers installed over country 
> (most of them handle small traffic), in forwarding mode, first thing i 
> am doing on forwarding setup - disabling gro/gso/tso. It is helped also 
> many ISP on their forum where i visit often, first thing in 
> troubleshooting unreliable network traffic forwarding - disabling 
> offloading.
> Because problem starts from incorrect shaping, and ends in some cases 
> with network drivers spitting watchdog errors. Sometimes even shaper not 
> necessary, just plain forwarding with offload enabled can cause issues, 
> but it might be bug in networking drivers.
> Should i try to reproduce and report? Sure if anybody can look into this 
> issue.


Well, I am telling you.

Say no to people advising to turn off GRO/TSO.

If you were the guy adviding others to do so, it is time to see the
light.

Lets fix the bugs if any, instead of spreading disinformation.

I am so tired of telling these very simple facts guys.

If you prefer, continue to work on linux-2.0 but don't ask help on
netdev.



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