[petsc-users] Convert MatNest to MatAIJ

[Dmitry Karpeev]

It would be good to have a meaningful test case to motivate the further
development.
I initially wrote it to enable GAMG for KKT systems, but that is still on
the back burner,
although it might be coming back to the front, since elastic contact is
becoming more
important for MOOSE. With a good test case it might be easier for me to
improve the
PetscSF-based impl as well, as it avoids the unscalable ISAllGather().

Dmitry.


On Wed, Oct 10, 2012 at 2:05 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Wed, Oct 10, 2012 at 11:38 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>>       We should have a reasonable MatConvert_MatNest_MATAIJ. Perhaps you
>> can look at what Jed has started in petsc-dev and improve it enough to suit
>> your purpose.
>
>
> Dmitry wrote that function, but it needs to be tested. I have some
> uncommitted test code, but I wanted to figure out why the test was
> failing/fix it before pushing.
>
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