[petsc-dev] Issues trying to DM-ificate PetIGA

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>    This is a good idea. I've tried to implement it but run into a snag. With PCMG the outer KSP and the pre and post smoother on the finest level all share the same DM, but only the outer KSP should be using the computerhs() and computematrix() methods. The dmActive flag which is associated with a KSP is how the KSP knows if to utilize the DMKSP functions or not in this case.

Can't this same situation also arise for FAS or nonlinear preconditioning?

Maybe we can't avoid dmActive in SNES as well.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 818 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20150826/98a8c35d/attachment.sig>