netdev - Re: Poorer networking performance in later kernels?

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Message-Id: <20160419.121307.1112327654033728204.davem@davemloft.net>
Date:	Tue, 19 Apr 2016 12:13:07 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	socketcan@...tkopp.net
Cc:	pbutler@...usnet.com, rick.jones2@....com, netdev@...r.kernel.org
Subject: Re: Poorer networking performance in later kernels?

From: Oliver Hartkopp <socketcan@...tkopp.net>
Date: Tue, 19 Apr 2016 17:58:03 +0200

> On 04/19/2016 04:54 PM, Butler, Peter wrote:
> 
>>
>> I think the issue is resolved.  I had to recompile my 4.4.0 kernel
>> with a few options pertaining to the Intel NIC which somehow (?) got
>> left out or otherwise clobbered when I ported my 3.4.2 .config to the
>> 4.4.0 kernel source tree.  With those changes now in I see essentially
>> identical performance with the two kernels.  Sorry for any confusion
>> and/or waste of time here.  My bad.
>>
> 
> Can you please send the relevant changes in the config that caused the
> discussed issue?
> 
> Just in the case other people do a similar kernel upgrade from 3.x to
> a recent kernel and the current defaults lead to this non-optimal
> result.

+1