sorry for my outof date kernel . In the zap_low_mappingd function.there is a selection for kernel,as below: #ifdef CONFIG_X86_PAE set_pgd(swapper_pg_dir+i, __pgd(1 + __pa(empty_zero_page))); #else set_pgd(swapper_pg_dir+i, __pgd(0)); #endif If I have not define CONFIG_X86_PAE ,then the low mem will be invalided all . so any addressing operation will cause a page_fault because that page is not present. Am I right ? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
