Yes. I will try to see if there's a traceback.

-- 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
Engineering)
Alma Maters:
(1) Singapore Polytechnic
(2) National University of Singapore
My Primary Blog: http://teo-en-ming-aka-zhang-enming.blogspot.com
My Secondary Blog: http://enmingteo.wordpress.com
My Youtube videos: http://www.youtube.com/user/enmingteo
Email: space.time.universe@gmail.com
Mobile Phone (Starhub Prepaid): +65-8369-2618
Street: Bedok Reservoir Road
Country: Singapore

On Sun, Nov 8, 2009 at 9:50 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Sun, Nov 08, 2009 at 07:45:01PM +0800, Mr. Teo En Ming (Zhang Enming)
> wrote:
> >    Hi,
> >
> >    I have observed that there is a maximum limit to the number of PV or
> HVM
> >    virtual machines you can start before dom0 hangs or crashes.
> >
> >    For Fedora 11 Linux x86-64 PV guests, dom0 will crash when I start the
> 7th
> >    instance. Max I can start is 6 without crashing.
> >
> >    For CentOS 5.2 Linux x86-64 HVM guests, dom0 will crash when I start
> the
> >    4th instance. Max I can start is 3 without crashing.
> >
> >    I have 6 GB of DDR2-800 with Intel Pentium Dual Core E6300 2.8 GHz on
> >    Intel DQ45CB motherboard.
> >
> >    Are the above limits reasonable considering the hardware
> specifications of
> >    my computer?
> >
> >    I am using Xen 3.5-unstable changeset 20143 with pv-ops dom0 kernels
> >    2.6.30-rc3, 2.6.31-rc6, 2.6.31.1, 2.6.31.4, and 2.6.31.5. My host
> >    operating system is Fedora 11 Linux x86-64.
> >
>
> Dom0 or Xen shouldn't crash for starting guests.
> Sounds like a bug somewhere.
>
> Any errors/tracebacks? Do you have serial console configured?
>
> -- Pasi
>
>