The fix for JDK-8172020 increased some interpreter entry points (notably the return entry points) considerably because it added special handling for popframe/earlyreturn in cases where debugging is enabled.

This was just enough to overflow the current InterpreterCodeSize on AIX/ppc64 which was 230K until now:

# Internal Error (interpreter.hpp:105), pid=16449790, tid=258
# guarantee(codelet_size > 0 && (size_t)codelet_size > 2*K) failed: not enough space for interpreter generation

I propose to set it to 256K to be on the safe side again.