"Rolling until the pain subsides" is a never-reached goal, just like Mahler's strength quests.
Basically I like to think of it as a constant progression:
1) Today the quad hurts like hell on the foam roll
2) By next week the quad won't hurt as much
3) By next month it won't hurt at all, then I'll start using a harder roll (or pvc pipe if I'm really looking for pain)
4) Today the quad hurts like hell on the pvc pipe
5) etc...