diff --git a/README.md b/README.md
index 94982f9..2e248f1 100644
--- a/README.md
+++ b/README.md
@@ -81,3 +81,10 @@ Notes on the [Python benchmark](benchmark_python/):
 ## Concluding remarks
   - how is all of this relevant for the users of a computing cluster?
   - Never trust benchmarks! See for example [Producing Wrong Data Without Doing Anything Obviously Wrong!](https://users.cs.northwestern.edu/~robby/courses/322-2013-spring/mytkowicz-wrong-data.pdf)
+
+## Additional material if there's time left
+- how does memory *allocation* to processes work at the OS level?
+  - virtual memory
+  - swap
+  - optimistic over-committing allocation policies
+  - the oom-killer watchdog