On May 22, 2012, at 8:14 PM, Dmitry Karpeev wrote:

It sounds like you need to write a new PC implementation, possibly reusing pieces of PCASM.

Thanks! But then it will be too much work, I think, and what I tried to avoid.

Then you have control of what is being set up and when. Otherwise you are essentially hacking
PCASM and using its internal subsolvers, which are only available after PCSetUp().

Yes. Maybe I should follow your advice. Thanks again!

PCCOMPOSITE doesn't look like the right framework for this.

Dmitry.

On Tue, May 22, 2012 at 5:23 AM, Hui Zhang <mike.hui.zhang@hotmail.com> wrote:

Hi,

I have got a new question. I'm now constructing a PCComposite from PCASM and another PCKSP (coarse
problem). And construction of PCKSP needs to use the subksp's of PCASM. So I need to PCSetUp on the
PCASM, right? But the KSP using PCComposite would setup PCASM again. How can I avoid twice setup
of PCASM ?

Thanks,
Hui