[petsc-dev] Promote MatShellSetOperation() and MatShellSetContext() to Mat

[Jed Brown]

On Mon, Jun 6, 2011 at 13:44, Dmitry Karpeev <karpeev at mcs.anl.gov> wrote:

> A related matter: should there be a way to reset the MatSetValuesLocal
> method?
>

PCShellSetOperation() can reset any operation.


> The setting of local values frequently depends on factors other than
> the type of the matrix.
>

That's what the ISLocalToGlobalMapping is for.


> The default implementation depends only on the class (Mat) rather than
> the type (e.g., MATMPIAIJ)
> of the matrix.
>

The definition of the "local space" is something that should not depend on
the implementation.

It calls through mat->ops->setvalueslocal, so I don't understand your
concern.
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