I have used both VMM and VirtualBox.  Yes, you are correct both KVM/QEMU
(VMM is the GUI) and Virtual Box run on a true host OS and both boot
other guest OSs.  For example, the host OS could be SL7 running a SL6
guest and some other guest such as Windows.  I have run as many as seven
guests concurrently on my laptop; performance was marginal.  The more
RAM the better.

Good Luck,
-- 
Michael Duvall
Systems Analyst, Real-Time
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(954) 973-5395 Office
(954) 531-4538 Mobile
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-----Original Message-----
From: Yasha Karant <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Subject: Re: two mysteries
Date: Mon, 25 Jan 2016 13:32:30 -0500

On 01/24/2016 06:06 PM, Lamar Owen wrote:
> On 01/23/2016 01:30 PM, Yasha Karant wrote:
>> Perhaps someone else has experienced what I related below and can 
>> comment -- SL 7x.
>>
>> 1.  ... For 802.3, I prefer to use a manual configuration, not 
>> NetworkManager.
>
> For a dynamic connection even with a wired Ethernet you should use the 
> supported NetworkManager stack, your personal preferences aside.  NM 
> works and doesn't require munging for a simple DHCP wired connection.
>
>>
>> 2.  ...Note that I must use MS Win to work with these devices as the 
>> application software for the device in question is *NOT* available 
>> for linux, the device is proprietary (no source code available), and 
>> CrossOver/Wine does not support USB -- forcing the use of a VM 
>> running a MS Win gues
>
> Neither VMware nor VirtualBox ship as part of SL.  KVM does, and USB 
> passthrough works very well with Windows 7 running in a KVM virtual 
> machine on my laptop.  It just works, and it's already part of SL; why 
> not use it?  Performance is very good in my experience, and I'm 
> running a few pieces of software in Win 7 for the same reasons as 
> you.  You're also far more likely to get useful help using KVM, either 
> from the list or from other sources, such as the Red Hat or Fedora 
> documentation.

 From the KVM site (http://www.linux-kvm.org/page/Management_Tools) that 
has a RedHat logo, there is a list of management interfaces, including 
VMM (Virtual Machine Manager -- https://virt-manager.org/screenshots/ ) 
that also appears to be a Red Hat entity.  Anyone using VMM?  VMM 
appears to allow a true host OS (supervisor, not hypervisor) with the VM 
("hypervisor") running under the OS (as with VMWare workstation/player 
or VirtualBox), thus booting an OS, not a hypervisor that actually 
provisions for guest supervisors.  Is this correct?

Yasha Karant