petsc-3.12.5 2020-03-29

KSPSetDMActive

Indicates the DM should be used to generate the linear system matrix and right hand side

#include "petscksp.h" 
PetscErrorCode  KSPSetDMActive(KSP ksp,PetscBool flg)

Logically Collective on ksp

	ksp	- the preconditioner context
	flg	- use the DM

By default KSPSetDM() sets the DM as active, call KSPSetDMActive(ksp,PETSC_FALSE); after KSPSetDM(ksp,dm) to not have the KSP object use the DM to generate the matrices.

intermediate