On 03/27/2012 10:48 PM, Michael Hennebry wrote:
> On Mon, 26 Mar 2012, Patrick O'Callaghan wrote:
>
>> On Mon, 2012-03-26 at 18:50 -0500, Michael Hennebry wrote:
>
>>> My machine has 4 GB.
>>> I got in March 2006. NX for pentium 4s were available in 2004.
>>> That said, how do I find out for sure whether my pentium has NX?
>>
>> grep -i nx /proc/cpuinfo
>
> Stepping 9.
> No NX.
>
> Of course, the next question is whether the installer or installee require NX.
>

Well, I install on a Vbox VM and it doesn't have NX in its flags.

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Michael Hennebry wrote:
> Stepping 9.
> No NX.
>
> Of course, the next question is whether the installer or installee require NX.

No, but it allows the kernel to block certain sorts of attacks. I’m
pretty sure Fedora kernels still use Exec-Shield on non-NX processors,
which should provide most of the same benefits:
http://fedoraproject.org/wiki/Security/Features#Exec-Shield

(Also note that it’s possible that your BIOS disables NX, in which case
it wouldn’t show up in /proc/cpuinfo).

But you’ll make best use of 4GB of RAM with the PAE kernel anyway.

James

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On 03/27/2012 01:13 PM, James Wilkinson wrote:

But you’ll make best use of 4GB of RAM with the PAE kernel anyway.


AIUI, the 32-bit installer gives you a PAE kernel if your CPU can handle
it and has for quite some time. My laptop has 3GB RAM and back when I
installed F 9 on it, I found that I'd gotten the PAE kernel. In fact,
that's when (and how) I learned what PAE is, because I'd not heard of it
before.

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