[petsc-dev] How to respond to incompatible right/left preconditioned/unpreconditioned?

[Jed Brown]

On Wed, Mar 16, 2011 at 22:53, Barry Smith <bsmith at mcs.anl.gov> wrote:

> This is an oversight, it should generate an error.
>

 It does now.


> > So what if instead we had KSP_NORM_DEFAULT and PC_SIDE_DEFAULT, then
> KSPSetUp_XXX() would turn the default value into whatever actually works and
> error if the user has set an incompatible combination?
>
>   Sounds reasonable.
>

I haven't done this yet so right now users have to change the norm type
explicitly when they switch sides.
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