On Sat, Oct 10, 2020 at 2:52 AM Nadav Amit <nadav.amit@xxxxxxxxx> wrote: > I guess that the test makes an assumption that there are no addresses > greater than 4GB. When I reduce the size of the memory, the test passes. Yes; the identity-mapped page used for real-address mode has to be less than 4Gb. I think this can be fixed with an entry in unittests.cfg that specifies -m 2048.