Re: [Xen-devel] [Xen-users] Unable to start Windows 8 HVM guest with Xen VGA Passthrough with Xen 4.2.1-pre

["Teo En Ming (Zhang Enming)" <singapore.mr.teo.en.ming@xxxxxxxxx>]

Dear Casey,

I had dom0_mem set to 1024 and 4096 as well, but it did not help. I am still getting the errors.

I have 6 GB of memory installed. How much memory should I assign to dom0_mem?

Thank you for your prompt reply.

-- 
Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore

On 30/09/2012 00:22, Casey DeLorme wrote:

Hello Teo,

That output is identical to the errors I had a few days ago, which was related to available RAM.

Ian helped me debug it, said xl was having a ballooning problem and couldn't free up enough RAM in time to start my HVM.

His suggested solution was to assign a fixed amount of RAM to Dom0 and turn off ballooning.

Prior to this I had been letting Dom0 take all the RAM, but this problem was fixed by adding dom0_mem to grub.cfg and setting a fixed value.

Have you tried re-running the xl create command after the first error? There are commands to move RAM around at run-time as well that you could try.

~Casey

On Sat, Sep 29, 2012 at 12:09 PM, Teo En Ming (Zhang Enming) <singapore.mr.teo.en.ming@xxxxxxxxx> wrote:

On 29/09/2012 21:35, Teo En Ming (Zhang Enming) wrote:

Hi,

I have applied Xen VGA passthrough patches from David Techer's
personal website to Xen 4.2.1-pre source tree. Everything compiled and
installed smoothly. But when I tried to start Windows 8 HVM domU with
VGA passthrough, it gave me the following error:

xc: error: unable to allocate memory to the HVM guest. (16: device or
resource busy): Internal error.

There are no issues with Xen 4.2-unstable changeset 25099 however.

Attached are screenshots of the errors for Xen 4.2.1-pre and Xen configuration files.

The following are links to screenshots of the errors for Xen 4.2.1-pre.

http://i45.tinypic.com/2j3s7pj.jpg

http://i45.tinypic.com/95myc3.jpg

--
Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore

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