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Date: Fri, 13 Jun 2014 10:31:45 -0700
From: Greg KH <greg@kroah.com>
To: Christoph Lameter <cl@gentwo.org>
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Cc: ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [CORE TOPIC] Redesign Memory Management layer
 and more core subsystem
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On Fri, Jun 13, 2014 at 11:57:04AM -0500, Christoph Lameter wrote:
> On Thu, 12 Jun 2014, John W. Linville wrote:
> 
> > AF_PACKET provides some level of hardware abstraction without a lot of
> > overhead for networking apps that are prepared to deal with raw frames.
> > Is this the kind of networking API you would propose?
> 
> The kernel is still in the data path and will cause limitations in terms
> of bandwidth and latency.

Of course it will, nothing is "free".  If this is a problem, then run
one of the many different networking stacks that are in userspace that
are tailored to a specific use-case.  The kernel has to provide a
"general" use case stack, that is its job.

greg k-h