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I''ve been working through the book ''Beginning Ruby on Rails E-Commerce'' which is very heavy on Test Driven Development. As in, you have to write tests for scaffolding methods and validations and crap like that. And then they fail. And you KNOW its the test not the method. So you spend 2x the time writing a test that has to be adapted when requirements change. You

...x\n", pv->pv_va, tpte); @@ -1728,9 +1894,9 @@ void pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) { - pt_entry_t *pte; - pd_entry_t pde; - vm_offset_t nva; + register unsigned *ptbase; + vm_offset_t pdnxt, ptpaddr; + vm_pindex_t sindex, eindex; int anychanged; if (pmap == NULL) @@ -1746,15 +1912,20 @@ anychanged = 0; - for (; sva < eva; sva = nva) { + ptbase = get_ptbase(pmap); + + sindex = i386_btop(sva); + eindex = i386_btop(eva); + + for (; sindex < eindex; sindex = pdnxt) { unsigned pdirindex; - nva = (sva + NBPDR) & ~P...