[petsc-dev] Revamping the multilevel KSP interface

[Jed Brown]

On Sat, Mar 17, 2012 at 18:45, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> What is the use case where you want initial guess and right hand side to
> be a callback?


Is grid sequencing the only use case? What is the plan with grid sequencing
for linear problems? Are the people who really want to do that capable of
using SNES with KSPONLY? That would also make it easier to use a higher
order prolongation the first time a given grid is reached, but use standard
interpolants in subsequent cycles (as Achi does for the best work
estimates).
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