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Re: NX-bit not enabled on even though CPU supports it (FC4)



On Wed, Apr 19, 2006 at 07:43:15PM +0200, Ingemar Nilsson wrote:
 
 > I have a laptop with an Intel Pentium M 760 (Dothan family) processor, but
 > even though the Intel CPU comparison chart on their website says that my
 > CPU supports the NX bit, I get the following message in dmesg:
 > 
 > dmesg | grep -i nx
 > Using x86 segment limits to approximate NX protection
 > 
 > This message was mentioned in an earlier thread as meaning that NX bit
 > emulation is turned on since the CPU lacks NX bit support. By the way, 'nx'
 > is also listed as a flag when I do
 > 
 > cat /proc/cpuinfo
 > 
 > Any ideas?
 > 
 > My system is FC4 with the latest kernel (2.6.16-1.2069_FC4).

NX needs physical address extensions (PAE) enabled.
The only FC5 kernel that does this is the -smp kernel.

		Dave

-- 
http://www.codemonkey.org.uk


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