[petsc-dev] attaching field information to PetscLayout?

[Jed Brown]

On Mon, May 16, 2011 at 13:52, Dmitry Karpeev <karpeev at mcs.anl.gov> wrote:

> True, although MatSetValuesLocal (not the default implementation in
> the interface)
> is a way to extend the mechanism that relies on ISLocalToGlobalMapping.
> This can include whatever semantics are appropriate to handle the overlaps,
> etc.
> I think this is a reasonable splitting of functionality between
> PetscLayout and MatSetValuesLocal().
>

Yes, I agree that the MatGetLocalSubMatrix()/MatSetValuesLocal() paradigm is
a good way to manage overlap. With more general transformations, we could
consider extending the interface (or having a new interface that is similar
in spirit).
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