When I run the demo code

I get output with the warning

firedrake:WARNING Creating new TransferManager to transfer data to coarse grids
firedrake:WARNING This might be slow (you probably want to save it on an appctx)

The same warning appears for my own codes, which often use -pc_type mg.  This is new behavior for me, i.e. as of a firedrake update about 2 months ago.  How should I update this demo to avoid the warning message?

Is there an example where it is added to an appctx?  I'm curious about the cause of the warning, because I would not want mesh-specific info in a PETSc appctx, generally, I think ...

Thanks!

Ed

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