Hi. Looking through dmesg on my laptop, I noticed the following: Using x86 segment limits to approximate NX protection While this is certainly nice, the processor is quite capable of real NX: $ grep nx /proc/cpuinfo flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr Is there a reason this is not used? kernel is 2.6.19-1.2891, processor is a Intel Core Duo CPU L2400 -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list