No, I didn't limit dom0 memory in grub.conf.
Here's my xm info output after I have shutdown all the virtual machines.
[root@fedora11-x86-64-host ~]# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 2812 2 r----- 3242.5
[root@fedora11-x86-64-host ~]# xm info
host : fedora11-x86-64-host
release : 2.6.30-rc3-enming.teo-tip
version : #1 SMP Wed Aug 19 23:14:15 SGT 2009
machine : x86_64
nr_cpus : 2
nr_nodes : 1
cores_per_socket : 2
threads_per_core : 1
cpu_mhz : 2800
hw_caps : bfebfbff:20100800:00000000:00000140:0400e3bd:00000000:00000001:00000000
virt_caps : hvm hvm_directio
total_memory : 6039
free_memory : 3124
node_to_cpu : node0:0-1
node_to_memory : node0:3124
xen_major : 3
xen_minor : 5
xen_extra : -unstable
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : Tue Sep 01 11:34:31 2009 +0100 20143:a7de5bd776ca
xen_commandline : iommu=1
cc_compiler : gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC)
cc_compile_by : root
cc_compile_domain : (none)
cc_compile_date : Thu Sep 10 07:01:13 SGT 2009
xend_config_format : 4
--
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 Mon, Nov 09, 2009 at 06:52:37PM +0800, Mr. Teo En Ming (Zhang Enming) wrote:> [1]http://www.youtube.com/watch?v=LbLaPpwNAx4
> Hi,
>
> Please watch this 4-minute video at
>Have you limited dom0 memory (by specifying dom0_mem=XMB option in
> 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?
>
grub.conf for xen.gz) ?
What does "xm info" say about free memory before starting any guests?
-- Pasi