[vbox-dev] VirtualBox network patches for FreeBSD (vboxnetflt + vboxnetadp)

Alexander Eichner Alexander.Eichner at Sun.COM
Wed Sep 9 12:32:03 PDT 2009

Hi Fredrik,

thanks a lot for these patches. You did a great job. Everything works
without problems here so far. I committed the patches to our repository
with minor modifications (mostly coding style :) ). It should appear in
our public svn soon.
Thanks again.

Alexander Eichner

Am Mittwoch, den 09.09.2009, 15:31 +0200 schrieb Fredrik Lindberg:
> Danny Braniss wrote:
> > 
> > great work!
> > any chance it will support PXE?
> > what about throughput, at the moment iperf timet it at 120Mbits/sec
> > but the host is connected at 1G.
> > 
> > danny
> > 
> It supports PXE. However the OSE version of VirtualBox does only have
> PXE booting on the PCnet interfaces not the Intel ones.
> Also, if you're going to boot a FreeBSD kernel you'll need to patch
> the etherboot code in virtualbox, otherwise it will abort with
> "Unable to load file".
> I don't know whether it's FreeBSDs pxeboot or etherboot that is the
> offender here.
> See, for more info
> http://lists.freebsd.org/pipermail/freebsd-emulation/2007-April/003503.html
> Throughput is not something I have actively looked at, there might be
> something that can be optimized regarding mbuf to SG-convertion.
> One source is most likely due to its dependency on the netgraph
> system which causes an additional packet detour.
> It uses netgraph because it's the only reliable way to hook
> into the input/output path of ethernet interfaces, and
> that also works properly on FreeBSD 7 and higher.
> Fredrik
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