linux-kernel - Re: [PATCHv2 0/2] vhost: a kernel-level virtio server

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Message-Id: <200908121540.44928.arnd@arndb.de>
Date:	Wed, 12 Aug 2009 15:40:44 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Gregory Haskins <gregory.haskins@...il.com>,
	netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	hpa@...or.com, Patrick Mullaney <pmullaney@...ell.com>
Subject: Re: [PATCHv2 0/2] vhost: a kernel-level virtio server

On Wednesday 12 August 2009, Michael S. Tsirkin wrote:
> > If I understand it correctly, you can at least connect a veth pair
> > to a bridge, right? Something like
> > 
> >            veth0 - veth1 - vhost - guest 1 
> > eth0 - br0-|
> >            veth2 - veth3 - vhost - guest 2
> >            
> Heh, you don't need a bridge in this picture:
> 
> guest 1 - vhost - veth0 - veth1 - vhost guest 2

Sure, but the setup I described is the one that I would expect
to see in practice because it gives you external connectivity.

Measuring two guests communicating over a veth pair is
interesting for finding the bottlenecks, but of little
practical relevance.

	Arnd <><
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