in irix?
6. Investigate why things do not work without the setup_test() call
being invoked on all nodes in ip27-memory.c.
-7. Too many CLIs in the locore handlers :
-For the low level handlers set up by set_except_vector(),
-__tlb_refill_debug_tramp, __xtlb_refill_debug_tramp and cacheerror,
-investigate whether the code should do CLI, STI or KMODE.
8. Too many do_page_faults invoked - investigate.
9. start_thread must turn off UX64 ... and define tlb_refill_debug.
10. Need a bad pmd table, bad pte table. __bad_pmd_table/__bad_pagetable