From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= <pasik@iki.fi>
Subject: Re: [Xen-devel] Re: Max. PV and HVM Guests
Date: Mon, 9 Nov 2009 13:54:58 +0200
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To: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@gmail.com>
Cc: xen-devel@lists.xensource.com, xen-users@lists.xensource.com, Robert Dunkley <Robert@saq.co.uk>
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On Mon, Nov 09, 2009 at 06:52:37PM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
>    Hi,
> 
>    Please watch this 4-minute video at
>    [1]http://www.youtube.com/watch?v=LbLaPpwNAx4
> 
>    I have only started 3 HVM Linux guests with 1 GB ram each. I can't start
>    the 4th HVM guest. If I attempt to start the 4th instance, it will crash
>    dom0.
> 
>    Are there anything in the xm dmesg output that could explain the low limit
>    to the number of VMs that I could start before dom0 becomes unresponsive?
> 

Have you limited dom0 memory (by specifying dom0_mem=XMB option in
grub.conf for xen.gz) ?

What does "xm info" say about free memory before starting any guests? 

-- Pasi