Xen users - Jun 2011 - dom0 dedicated memory Xen dom0 dedicated memory and preventing dom0 memory ballooning

I''m trying to configure GRUB to allocate fixed amount of dedicated 
memory to dom0, according to this best practices thread 
(http://wiki.xensource.com/xenwiki/XenBestPractices | "Xen dom0 
dedicated memory and preventing dom0 memory ballooning "). When I 
reboot, dom0 has the fixed amount of memory as it was configured, but 
neither xm info shows the rest of memory available for the Hypervisor, 
nor can start domUs (due to lack of memory). For me it seems that the 
memory over the configured dom0_mem parameter is somehow invisible to 
the Hypervisor and both dom0/dumUs are unable to use it.

Is the given best practices article broken, or am I missing something?

-------
Debian Squeeze
ii  linux-image-2.6.32-5-xen-amd64      2.6.32-34squeeze1            
Linux 2.6.32 for 64-bit PCs, Xen dom0 support
ii  xen-hypervisor-4.0-amd64            4.0.1-2                      The 
Xen Hypervisor on AMD64
------

Thank you in advance!

Barny Kadlecsik

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Barny Kadlecsik wrote:
>I''m trying to configure GRUB to allocate fixed amount of dedicated 
>memory to dom0, according to this best practices thread 
>(http://wiki.xensource.com/xenwiki/XenBestPractices | "Xen dom0 
>dedicated memory and preventing dom0 memory ballooning "). When I 
>reboot, dom0 has the fixed amount of memory as it was configured, 
>but neither xm info shows the rest of memory available for the 
>Hypervisor, nor can start domUs (due to lack of memory). For me it 
>seems that the memory over the configured dom0_mem parameter is 
>somehow invisible to the Hypervisor and both dom0/dumUs are unable 
>to use it.
>
>Is the given best practices article broken, or am I missing something?
>
>-------
>Debian Squeeze
>ii  linux-image-2.6.32-5-xen-amd64      2.6.32-34squeeze1           
>Linux 2.6.32 for 64-bit PCs, Xen dom0 support
>ii  xen-hypervisor-4.0-amd64            4.0.1-2 
>The Xen Hypervisor on AMD64
>------
Working here for me, what is the boot stanza (ie the section from the 
grub config) for that hypervisor & kernel ?

What does "xm info" say about memory ?

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
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Christmas stocking fillers. Some available as e-books.

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