[Xen-devel] Re: [Fedora-xen] 2.6.31-1.2.65.xendom0.fc12.x86_64 crash on boot

[Charles J Gruener]

This is coming from memory as I won't be in front of the machine  
experiencing the issue for another three weeks. Gotta love paternity  
leave. :)

 From what I recall, if I leave VT-d enabled in the BIOS, I experience  
the dom0 crash I had sent earlier as a .gz file.  I can verify this at  
a later date.

Ideally, I am looking to have the ability to assign the NVidia cards  
to the individual domU machines for CUDA development. We want to see  
how virtualization affects CUDA performance among other things.

The patch that you provided earlier now allows the machine to boot no  
matter what the NX setting is in the BIOS.

Does that help clarify the situation?

Charles

On Sep 21, 2009, at 3:07 PM, "Jeremy Fitzhardinge" <jeremy at goop.org>  
wrote:

>
>> Just a final note, I do need to make sure VT-d is disabled in the
>> BIOS, and then I can boot.  This was obviously not addressed in this
>> patch nor was it requested to be.  It would be nice to have it  
>> working
>> at some point as this machine will hopefully have a bunch of NVidia
>> cards in it that will need to be dedicated to each of the domU's for
>> CUDA research.
>
> Just to clarify this a bit:
>
>    Are you saying that if you leave VT-d enabled in BIOS something bad
>    happens?  Does it crash?
>
>    But ideally you'd like to enable it and have it working to allow
>    NVidia cards work, which require it?
>
> Thanks,
>    J