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Re: Virtualization of OpenBSD 3.9 on Xen

On Friday 21 April 2006 11:10,  Stefan Kaltenbrunner <stefan_(_at_)_kaltenbrunner_(_dot_)_cc> wrote:
> Dave Feustel wrote:
> > On Saturday 15 April 2006 17:53, Anthony Liguori wrote:
> > 
> >>On Sat, 15 Apr 2006 17:39:10 -0500, Dave Feustel wrote:
> >>
> >>>AMD Pacifica and Intel's VT make possible the virtualization of unmodified
> >>>operating systems. Is it still necessary to add code to the hypervisor to
> >>>support specific operating systems, or can Xen, as written, support any
> >>>arbitrary OS that successfully boots on a PC? (I'm thinking of the BSDs
> >>>here).


> >>While theoretically, 
> >>VT and SVM ought to allow any OS to run under Xen, in practice, if an OS
> >>hasn't been tested as a guest under Xen, it is likely to turn up some bugs
> >>or incompleteness.  Over time, this will certainly be a less of an issue.
> >>
> >>The problem has to do with the fact that different OS's will use different
> >>instructions when accessing things like page tables.  Right now, Xen only
> >>emulates the instructions that we know are used by the systems we test
> >>with (things like Linux and certain versions of Windows).
> > 


> OpenBSD 3.9 works quite fine (installed using the native installer in
> the virtualized environment!) as an unmodified guest on my Intel VT box,
> with following caveats:
> *) pcn(4) - aka AMD Pcnet does not seem to work well with the emulated
> one (send works - receive does not)
> *) ne(4) does work but is complaining about corrupted nic memory under
> heavy traffic (does not seem to affect it much other than logging th errors)
> Stefan

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