[Xen-devel] Re: [PATCH] xen: core dom0 support

[Anthony Liguori <anthony@xxxxxxxxxxxxx>]

H. Peter Anvin wrote:
> In particular, Xen is a microkernel-type operating system.  The dom0 
> model is a classic single-server, in the style of Mach.  A lot of the 
> "Xen could use a distributed dom0" arguments were also done with Mach 
> ("the real goal is a multi-server") but such a system never 
> materialized (Hurd was supposed to be one.)  Building multiservers is 
> *hard*, and building multiservers which don't suck is even harder.
A lot of the core Xen concepts (domains, event channels, etc.) were 
present in the Nemesis[1] exo-kernel project.
Two other interest papers on the subject "Are virtual machine monitors 
microkernels done right?"[2] from the Xen folks and a rebuttal from the 
l4ka group[3].
[1] http://www.cl.cam.ac.uk/research/srg/netos/old-projects/nemesis/
[2] http://portal.acm.org/citation.cfm?id=1251124
[3] http://l4ka.org/publications/paper.php?docid=2189

Regards,

Anthony Liguori
>     -hpa

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