[petsc-dev] block size information in gamg

[Stefano Zampini]

Mark,

I was wondering if you could provide an API/command line customization for
PCGAMG to explicitly provide the "block size" of the problem to the gamg
solver, instead of using the block size of the matrix. The matrix block
size could be always used as a fallback if this new information as not been
provided.

I'm interfacing a complicated finite element package to PETSc , where you
cannot do any assumption on the blocksize of the problem during matrix
setup, and (AFAIK) I cannot change the block size with a call to
MatSetBlockSize after the matrix has been finalized without hacking (that I
would like to avoid).

Thanks
-- 
Stefano
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