Re: [Xen-devel] [libvirt] [PATCH 1/4] libxl: implement NUMA capabilities reporting

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

Dario Faggioli <dario.faggioli@xxxxxxxxxx> wrote:

>[Moving the conversation on @xen-devel and adding Jan, as that seems
>more appropriate]
>
>[Jan, this came up as I'm implementing some NUMA bits in libvirt but,
>as
>you see, the core of Jim's question is purely about Xen]
>
>On lun, 2013-07-01 at 16:47 -0600, Jim Fehlig wrote:
>> On my non-NUMA test machine I have the cell memory reported as
>> 
>>            <memory unit='KiB'>9175040</memory>
>> 
>Which is 8960, if divided by 1024, so at least it's consistent.
>
>However...
>
>> The machine has 8G of memory, running xen 4.3 rc6, with
>dom0_mem=1024M.  'xl 
>> info --numa' says
>> 
>> total_memory           : 8190
>> ...
>> numa_info              :
>> node:    memsize    memfree    distances
>>     0:      8960       7116      10
>> 
>> Why is the node memsize > total_memory?
>
>Mmm... Interesting question. I really never paid attention to this...
>Jan (or anyone else), is that something known and/or expected?
>
Is the difference not the amount that Xen hypervisor consumes?  It just has not 
been subtracted from the NUMA values. 
-- 
Sent from my Android phone. Please excuse my brevity.

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