Re: [Xen-users] VMWare vs. Xen, is the conflict by VMware deliberate?

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

Nico Kadel-Garcia wrote:
> I've been trying to virtualize SCO OpenServer 5.0.6 for various 
> reasons, and found that the Xensource 4.x doesn't support it, nor does 
> the open source Xen 3.x in any of the environments I've tried. It 
> works on VMware, but for various reasons I prefer to use Xen on my 
> Dom0. (I like open source, and the base OS for the commercial reasons 
> is much, much more recent, and I suspect the Xen Dom0 performance for 
> managing backup systems is superior.)
> So, I tried running VMWare Workstation on top of a Xen enabled Dom0. 
> And VMWare promptly started up with a "You're running a Xen 
> Hypervisor! Bad sys-geek, no biscuit! We're taking our start-up tool 
> and going home, p-b-b-b-b-b-b-t-h!"
> Is this a well-founded refusal to start on their part, perhaps due to 
> kernel behavior conflicts? Or is this an anti-competitive move,
VMware requires that your host kernel be run in ring 0 (to do cpu 
scheduling, memory management and provide timer interrupts) where as in 
xen architecture hypervisor has taken ring 0 and deprivileged the guest 
kernel (dom0 kernel) to other rings. So running VMware on dom0 doesn't 
allow it to virtualize cpu, memory. My 2 cents
--Sadique

> to avoid being able to run VMware Workstation on Xen Dom0's and force 
> people to select VMWare only? I've not taken apart the kernel modules 
> well enough to tell, but I hate to have to dedicate entire servers to 
> VMware: it can absorb the resources I'd otherwise use to provide Xen.
>
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