-+ fix makefile to compute dependency info as a side-effect of compilation (-MF)
-+ support integer keys for ht
-+ optimize tracing code, still too much overhead
-+ use NULL instead of a sentinal node in skiplist and list
-+ make the interfaces for all data structures consistent
-+ make list and skiplist use string keys
-+ optimize integer keys
-+ ht_print()
-+ iterators
-- make rcu yield when its buffer gets full instead of throwing an assert
-- alternate memory reclamation schemes, hazard pointers and/or reference count
-- investigate 16 byte CAS; ht can store GUIDs inline instead of pointers to actual keys
+memory reclamation
+------------------
+- allow threads to dynamically enter and exit rcu's token passing ring
+- augment rcu with heartbeat manager to kill and recover from stalled threads
+- make rcu try yielding when its buffer gets full
+- use alternate memory reclamation schemes: hazard pointers and/or reference counting
+
+quality
+-------
+- verify the memory management of keys in list, skiplist, and hashtable
+- transaction tests
+- port perf tests from lib-high-scale
+- characterize the performance of hashtable vs. skiplist vs. list
+- validate function arguments in interface functions