Current 15-213 student here in the middle of malloc lab, my current solution is probably worse than anything in that link (left unclicked).

Give it a spin, you might learn something. Your class is probably focusing on general purpose, system level allocators; a much thornier problem without any really good answers. As How to Solve It states; if you can't solve the given problem, try to solve a simpler version of the problem.

In retrospect, that class was amazing. At the time, I hated it.