[petsc-dev] who broke petsc-dev

[Matthew Knepley]

On Sun, Nov 13, 2011 at 10:44 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Sun, Nov 13, 2011 at 16:36, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>> 1) It is legitimate to call KSPSetOperators with a null Amat so this is a
>> bug that crashes large parts of PETSc
>>
>
> This logic should be moved much later (like to KSPSetUp()).
>

I disagree, since SetOperators() is where we know that the matrix is
changing.

   Matt


>
>
>>
>> 2) Do you really want to do this? I am not sure I like it.
>>
>
> I think that attaching the null space to the Mat should be the preferred
> way to communicate it, especially in the case of a deeply nested hierarchy.
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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