[petsc-users] How to fix max linear steps in SNES

[Yingjie Wu]

Dear Petsc developer:
Hi,
I recently debugged my program, which is a two-dimensional nonlinear PDEs
problem, and solved by SNES. I find that the residual drop in KSP is slow.
I want to fix the number of steps in the linear step, because I can not
choose a suitable ksp_rtol. I use the command: -ksp_max_it 200, and I want
to fix the number of iterations per ksp. But the program seemed to stop in
the first nonlinear step.

Linear solve did not converge due to DIVERGED_ITS iterations 200
Nonlinear solve did not converge due to DIVERGED_LINEAR_SOLVE iterations 0


How can I fix the maximum number of iterations of linear steps without
stopping the program before the convergence of the non-linear steps?

Thanks,
Yingjie
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