He’s not getting swap. Or in a sense he is... you can still thrash.. the read only pages of the executable and any memory mapped files are still eligible to be

He’s not getting swap. Or in a sense he is... you can still thrash.. the read only pages of the executable and any memory mapped files are still eligible to be paged out. When you get into a memory pressure situation you end up with a handful of executable pages of all the active programs getting faulted-in on every context switch.