[petsc-dev] Mark, what's the rational for keeping the Chebyshev tuning inside GAMG?

[Barry Smith]

  Mark,

   What's the rational for keeping the Chebyshev tuning inside GAMG that 
duplicates that is already support by KSPChebyshev ? I'd like to remove this 
chunk of code from GAMG since it is duplicative and instead make sure that the 
Chebyshev tuning  inside the KSPChebyshev provides everything that is needed.

   Also in particular what about the /* zeroing out BC rows -- needed for crazy 
matrices */ should this be ported to KSPChebyshev ?

    /* create cheby smoothers */
    for (lidx = 1, level = pc_gamg->Nlevels-2; lidx <= fine_level; lidx++, 
level--) {
      KSP       smoother;
      PetscBool flag,flag2;
      PC        subpc;

      ierr = PCMGGetSmoother(pc, lidx, &smoother);CHKERRQ(ierr);
      ierr = KSPGetPC(smoother, &subpc);CHKERRQ(ierr);

      /* do my own cheby */

Thanks

   Barry