Re: [Xen-devel] dom0 not seeing all of the assigned memory

[Roderick Colenbrander <thunderbird2k@xxxxxxxxx>]

On Mon, Feb 27, 2012 at 5:34 PM, Henrik Olsson <henrik@xxxxxxxx> wrote:
> On Thu, Feb 23, 2012 at 19:55, David Vrabel <dvrabel@xxxxxxxxxx> wrote:
>> On 22/02/12 22:19, Henrik Olsson wrote:
>>> Hi, i'm having some trouble with assigning memory to my dom0.
>>>
>>> I've added "dom0_mem=8192M" to the xen command line yet "free -m"
>>> reports only 5686MB total.
>>
>> [    0.000000] Freeing  6f000-100000 pfn range: 593920 pages freed
>> [    0.000000] 1-1 mapping on 6f000->100000
>> [    0.000000] Released 595312 pages of unused memory
>>
>> This accounts for most of your "missing" memory.  To get it back you
>> need to adjust the balloon driver's target to the amount of memory you want.
>>
>> David
>
> Hi, i'm not sure i understand..
>
> I've configured /etc/xen/xend-config.sxp with:
> (dom0-min-mem 8192)
> (enable-dom0-ballooning no)
>
> Shouldn't this disable ballooning? Or do i need to pass some parameter
> somewhere?
>
> Regards,
> Henrik
>
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Make sure you have added the following patch to your Xen if you are
using a recent >=3.1 kernel. Unfortunately it isn't in Xen 4.1.x, but
I guess it should be added to there:
http://xenbits.xen.org/hg/staging/xen-unstable.hg/rev/c56dd5eb0fa2

See if it helps.

Roderick

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