On Sat, Feb 11, 2012 at 08:32, Dmitry Karpeev <karpeev@mcs.anl.gov> wrote:
This sounds fine to me, but what's the API for doing this? You want to do KSPSetDM() and PCSetDM(), 
so that the user has to explicitly pull out the PC to set its DM?

The PC *always* owns both matrices anyway.