netdev - Re: fedora 14 kernel performance with ip forwarding workload

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Date:	Wed, 6 Apr 2011 14:08:01 -0700 (Pacific Daylight Time)
From:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	David Miller <davem@...emloft.net>,
	"acme@...stprotocols.net" <acme@...stprotocols.net>,
	"jesse.brandeburg@...il.com" <jesse.brandeburg@...il.com>,
	"fedora-kernel-list@...hat.com" <fedora-kernel-list@...hat.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: fedora 14 kernel performance with ip forwarding workload



On Wed, 6 Apr 2011, Eric Dumazet wrote:

> Le mercredi 06 avril 2011 à 13:29 -0700, David Miller a écrit :
> > From: Eric Dumazet <eric.dumazet@...il.com>
> > Date: Wed, 06 Apr 2011 22:18:56 +0200
> > 
> > > I remember last time I work on a fedora kernel, it had conntrack enabled
> > > 
> > > And yes, conntrack can really slowdown a router, because of default
> > > parameters.
> > 
> > Yes, if conntrack is enabled performance will indeed tank.
> 
> I just check on latest fedora14 (yum updated) :
> 
> - conntrack is statically included in kernel, you cannot remove it.
> 
> 
> Hmm...

Thanks for the replies, 
Yes indeed, I bet that conntrack was the item that caused the grief I saw.  
In fact turning off CONFIG_NETFILTER disables conntrack and solved my 
problem. :-)

Now the question is how to get the netfiltery/conntracky goodness without 
impacting those who want to go fast, maybe without a helmet.
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