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Re: [xen-devel][vNUMA v2][PATCH 2/8] public interface

To: Andre Przywara <andre.przywara@xxxxxxx>, Dulloor <dulloor@xxxxxxxxx>
Subject: Re: [xen-devel][vNUMA v2][PATCH 2/8] public interface
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 4 Aug 2010 06:27:37 +0100
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On 03/08/2010 22:55, "Andre Przywara" <andre.przywara@xxxxxxx> wrote:

>> As such, the purpose of vnode-to-mnode translation is for the enlightened
>> guests to know where their underlying memory comes from, so that
>> over-provisioning features
>> like ballooning are given a chance to maintain this distribution.
> I was afraid you were saying that ;-) I haven't thought about this in
> detail, but maybe we can make an exception for Dom0 only, because this
> is the most prominent and frequent user of ballooning. But I really
> think that DomUs should not know about or deal with host NUMA nodes.

So long as it gets renamed to 'node_id' in the info structure I'm okay with
it. That doesn't preclude simply setting that field to 0...nr_vnodes-1 and
doing translation in the hypervisor, but also leaves us a bit of

 -- Keir

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