When a page begins to get "full", TeX automatically squeezes lines slightly closer together (vertically) to help the page "break" where it thinks that it should.  If the page is less than full, then the (vertical) distance between lines is fixed.  How can I make this fixed distance remain fixed even as the page starts approaching full?  That is, I don't want the lines to squeeze together when the page gets full.  I'm familiar with

\clubpenalty
\interlinepenalty
\displaywidowpenalty
\widowpenalty
\keeplinestogether (ConTeXt)

but I'm not sure how to use any/all of these to get this effect.

Troy Henderson