Re: [Xen-devel] [RFC v2][PATCH 1/3] docs: design and intended usage for NUMA-aware ballooning

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 19/08/13 14:26, George Dunlap wrote:
> On Mon, Aug 19, 2013 at 1:58 PM, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
>> If we decide we do need such control, I think the xenstore interface
>> should look more like:
>>
>> memory/target
>>
>>   as before
>>
>> memory/target-by-nid/0
>>
>>   target for virtual node 0
>>
>> ...
>>
>> memory/target-by-nid/N
>>
>>   target for virtual node N
>>
>> I think this better reflects the goal which is an adjusted NUMA layout
>> for the guest rather than the steps required to reach it (release P
>> pages from node N).
> 
> This seems more sensible than a mask (as Jan suggested); but is it
> open to race conditions?

xenstore transactions could be used to make the reads/writes of the set
of values atomic.

David

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