CardTableRS (in cardTableRS.hpp/cpp) still contains code referring to PermGen and this code also complicates further cleanups of the card tables. Examples include (from cardTableRS.hpp):

    // These are for parallel collection.
    // There are three P (parallel) youngergen card values. In general, this
    // needs to be more than the number of generations (including the perm
    // gen) that might have younger_refs_do invoked on them separately. So
    // if we add more gens, we have to add more values.

...

  // An array that contains, for each generation, the card table value last
  // used as the current value for a younger_refs_do iteration of that
  // portion of the table. (The perm gen is index 0; other gens are at
  // their level plus 1. They youngest gen is in the table, but will
  // always have the value "clean_card".)