[dundee] Xen ... Pcie Pass through...HMV

[Sean McRobbie]

Running several on one machine fine here.

Regards,
Sean McRobbie

----- Original Message -----
From: "Lee Hughes" <toxicnaan at yahoo.co.uk>
To: "Tayside Linux User Group" <dundee at lists.lug.org.uk>
Sent: Tuesday, 10 March, 2009 23:15:58 GMT +00:00 GMT Britain, Ireland, Portugal
Subject: Re: [dundee] Xen ... Pcie Pass through...HMV


Perhaps gordon (the virtual god) can you answer me this. 

Is there a limit to the number of hmv that xen can run? I've heard it 1, but 
I've also heard you can have more. 

Why is the Xen documentation , so so so bad ;-).. hheheeheheh 

Just looking at kvm, seems the are adding full (hmv) to this as well. 

it all looks good, hopefully with iommu , vm's can get much better io performance.... 

I'm happy with openvz, after Gordon did a talk on it, I was sold.. it's all good baby, 
but that mainly for servers, the 3d desktop is the next battle ground. 

Yes, I do want to to be able to play directx without using wine, and without rebooting! 

now, I wonder 4 graphics cards, 4 hmv with pcie pass through, I could run every operating 
system going. ;-) hehehee 

Cheers, 
Lee 





--- On Tue, 10/3/09, gordon dunlop <astrozubenel at googlemail.com> wrote: 


From: gordon dunlop <astrozubenel at googlemail.com> 
Subject: Re: [dundee] Xen ... Pcie Pass through...HMV 
To: toxicnaan at yahoo.co.uk, "Tayside Linux User Group" <dundee at lists.lug.org.uk> 
Date: Tuesday, 10 March, 2009, 8:35 AM 





2009/3/8 Lee Hughes < toxicnaan at yahoo.co.uk > 


Hello all (gordon will like this). 

Seems Xen have finally got pcie pass through working with xen HVM domians in DOMu. 

Unfortunately I don't the require chipset to allow me to test this (it needs intel vt-d ) 
which gives an IOMMU. 


I have only got a dual core Opteron socket 939 which has no inbuilt vt instructions therefore I cannot run unmodified Linux guests in Xen. 



What this basically means is, you'll be able to run Xen, with either a linux system in Dom0 
or domU, and windows system in DomU and play direct X games, without rebooting. ;-) 

It's got lots of other uses to, like improving a vm's IO prerformance , heheeheh 

Check it out here 

http://wiki.xensource.com/xenwiki/VTdHowTo 

http://www.nabble.com/Successful-PCIe-Graphics-VT-d-Passthrough-to-Win32-DomU,-Q35-chipset-td21671745.html 


Very interesting links Lee, although you will need a motherboard with 2 graphics card slots. 

Gordon 



I'd say this is a interesting development. It's early days, so I guess it's not too stable. 
Who can tell. 

So if you have this chipset, please give it a try...... 

I've also heard some crazy talk about bios vendors building hypervisors into the bios's. 
So, you can just parition your machine, without the aid additional software. 

Crazy stuff. 



Cheers, 
Lee 



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