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Re: [Xen-devel] Max. PV and HVM Guests

To: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@xxxxxxxxx>
Subject: Re: [Xen-devel] Max. PV and HVM Guests
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sun, 8 Nov 2009 15:50:31 +0200
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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,,, and 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

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