netdev - Re: PF_RING: Include in main line kernel?

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Message-ID: <20091018123811.GD27747@prithivi.gnumonks.org>
Date:	Sun, 18 Oct 2009 14:38:11 +0200
From:	Harald Welte <laforge@...monks.org>
To:	Brad Doctor <brad.doctor@...il.com>
Cc:	netdev@...r.kernel.org, Luca Deri <deri@...p.org>
Subject: Re: PF_RING: Include in main line kernel?

Hi Brad and Luca,

On Wed, Oct 14, 2009 at 08:33:08AM -0600, Brad Doctor wrote:

> On behalf of the users and developers of the PF_RING project, we would
> like to ask consideration to include the PF_RING module in the main
> line kernel.

First of all, let me state that I think the mainline support for nProbe/nTop is
something that I have been hoping for many years.  I think the performance you
are achieving is remarkable, and it would be very usable to have this
capability of high performance zero-copy packet access from userspace as a
stock feature of the Linux kernel.

The actual PF_RING implementation has been criticized a couple of times even in
the past.  One general point I remember from past discussions in the kernel
network community was that there is too much overlap with PF_PACKET, and that
this could possibly be extended with a ring buffer rather than replaced with a
fairly similar alternative mechanism.

So let's see what kind of solution the current discussion thread will come up
with... let's hope eventually we'll have the functionality in the kernel.
-- 
- Harald Welte <laforge@...monks.org>           http://laforge.gnumonks.org/
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