# KSPFGMRESModifyPCNoChange
this is the default used by `KSPFMGMRES` - it doesn't change the preconditioner. [](sec_flexibleksp) 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode KSPFGMRESModifyPCNoChange(KSP ksp, PetscInt total_its, PetscInt loc_its, PetscReal res_norm, void *dummy)
```

## Input Parameters

- ***ksp -*** the ksp context being used.
- ***total_its     -*** the total number of `KSPFGMRES` iterations that have occurred.
- ***loc_its       -*** the number of `KSPFGMRES` iterations since last restart.
a restart (so number of Krylov directions to be computed)
- ***res_norm      -*** the current residual norm.
- ***dummy         -*** context variable, unused in this routine





## See Also
 [](chapter_ksp), [](sec_flexibleksp), `KSPFGMRES`, `KSPFGMRESSetModifyPC()`, `KSPFGMRESModifyPCKSP()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/gmres/fgmres/modpcf.c.html#KSPFGMRESModifyPCNoChange">src/ksp/ksp/impls/gmres/fgmres/modpcf.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/ksp/impls/gmres/fgmres/modpcf.c)


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