Re: [Xen-devel] XEN) vmx.c:2652:d1 Bad vmexit (reason 31) with Xen 4.0.1-rc7-pre (cs/ 23029)

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Sun, Mar 20, 2011 at 03:43:07PM -0700, Kay, Allen M wrote:
> Konrad,
> 
> I believe sharept=0 is the default.  If it is set to sharept=1, the code is 
> enabled only on the systems that has compatible EPT and VT-d page table 
> format.  There is no such hardware on the market yet.
> 
> What type of NHM SDP do you have?  Is it a HEDT (High End Desktop) with a 
> add-on graphics card?  I have been using a Westmere EP system (NHM 
> architecture generation) and have not seen this problem.  I also have ready 
> access to Ironlake SDP's I can test on if you see the same problem on 
> Ironlake (i.e. core i5) systems.

Not sure how to identify it. The motherboard does require a discrete graphic 
card.

> 
> Do you see the same problem if you do iommu=0 in the grub?

I tried 'iommu=off' but I think that is the same thing.

Let me try 'iommu=0' just to make sure.

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