Isn't it ridiculous pmap_protect() does following, is it?

        while (sva < eva) {
		...
                pte = ...
                for (; sva < nssva; sva += NBPG, pte++) {
                        entry = pte->pt_entry;
                        if (!mips_pg_v(entry))
                                continue;
                        entry = (entry & ~(mips_pg_m_bit() |
                            mips_pg_ro_bit())) | p;
                        pte->pt_entry = entry;
                      	...
                        MachTLBUpdate(sva | asid, entry);
                }
        }

When pmap_protect() is called by uvmspace_fork1(), code above fills a
bunch of entries into TLB which has only the capacity of 56, I think.

Tohru Nishimura