i386 and PAE NX (continued) We would like to use PAE on the i386, but are afraid of the complexity or performance effects Would have to support two MMU modes in the same architecture: OpenBSD/sparc - sun4, sun4c, sun4m: 3 architectures 7000 lines for pmap Typical pmap module is 1300-3000 lines of code Do not want PAE to be a compile option. I am trying to convince vendors to make a trivial 32-bit NX extension. i386 W^X is sufficient, but one day we must try using NX