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) > > 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 > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users > >