Re: [Xen-users] Set memory free after shutdown

[Daniele Piaggesi <d.piaggesi@xxxxxxxxxxxx>]

Todd Deshane wrote:
> You should look into the dom0_mem Xen boot option to adjust this.
> http://tx.downloads.xensource.com/downloads/docs/user/#SECTION04130000000000000000
>
> It seems that dom0 could then reclaim up to that (dom0_mem) maximum 
> amount of memory freed by VMs.
First of all thanks for help. Anyway I think that my problem should be a 
bit different. I notice that if I have a physical machine with (for 
example) 4Gb of Ram, and I start 3 virtual machine each one with 1Gb of 
Ram, the dom0 results to have the remaining free memory, that is 1Gb. So 
far so good. But if I stop one virtual machine (then the virtual 
machines used memory decrease to only 2Gb), dom0 still results to have 
only 1Gb. Then I think: Where is the giga released? And above all: why 
the memory released don't increase automatically, the dom0 memory (that 
is the physical host memory)? Is there a way to adjust this?
I don't know if my analysis is correct or if there's another way, or I'm 
doing something wrong, 'cause I'm not very expert about Xen, but I would 
to release to dom0, the memory previously used for one vm now stopped.
Thanks :)
Daniele

--
Daniele Piaggesi
Linux System Administrator
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