Re: [Xen-devel] NUMA TODO-list for xen-devel

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 01.08.12 at 18:16, Dario Faggioli <raistlin@xxxxxxxx> wrote:
>     - Virtual NUMA topology exposure to guests (a.k.a guest-numa). If a
>       guest ends up on more than one nodes, make sure it knows it's
>       running on a NUMA platform (smaller than the actual host, but
>       still NUMA). This interacts with some of the above points:

The question is whether this is really useful beyond the (I would
suppose) relatively small set of cases where migration isn't
needed.

>        * consider this during automatic placement for
>          resuming/migrating domains (if they have a virtual topology,
>          better not to change it);
>        * consider this during memory migration (it can change the
>          actual topology, should we update it on-line or disable memory
>          migration?)

The question is whether trading functionality for performance
is an acceptable choice.

Jan


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