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Re: [Xen-devel] [PATCH RFC v2 5/7] libxl/vNUMA: VM config parsing functions

Dario Faggioli writes ("Re: [Xen-devel] [PATCH RFC v2 5/7] libxl/vNUMA: VM 
config parsing functions"):
> On gio, 2013-10-10 at 12:25 -0400, Elena Ufimtseva wrote:
> > 3) if vdistance number of elements = vnodes * vnodes, take as it is.
> Sure.

I have some qualms about this:

Aren't there some constraints that need to be imposed ?  For example,
distance[X,Y]==distance[Y,X] ?  What about the triangle inequality
(distance[A,B] + distance[B,C] >= distance[A,C]) ?

Do we really want/need to allow the specification of any arbitrary
distance matrix (subject perhaps to such constraints) ?

If we do need this I think the nested lists are probably a better
syntax for specifying the whole array.  That would also more easily
allow the user to specify only half of the symmetric matrix, and make
it syntactically clearer what's intended.


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