[Frugalware-devel] i686 and PAE.

James Buren ryuo at frugalware.org
Sat Apr 23 21:58:34 CEST 2011


>From the wikipedia entry on NX bit:

Also note that it is used only with Physical Address Extension (PAE) page
table format, because the x86's original 32-bit page table format has no
bit 63 and therefore no bit to disable/enable execution.

>  From what I've read there most distros don't enable PAE by default
> but instead have a separate kernel package to provide a PAE enabled
> kernel.
>
>  I'm still against including PAE by default into the kernel and don't
> really see big benefits in doing this. The way I see it Frugalware on
> x86 runs very well as it is today and this might cause problems which
> given the limited resources available could be a problem.
>
>  In my opinion let's just leave it as it and worry about more important
> things.
>
> On Sat, Apr 23, 2011 at 8:42 PM, James Buren <ryuo at frugalware.org> wrote:
>>> On Fri, Apr 22, 2011 at 06:26:05PM -0500, James Buren
>>> <ryuo at frugalware.org> wrote:
>>>> Would it be wise to enable PAE on i686 if it is not already done? Just
>>>> a
>>>> thought of something for 1.5.
>>>
>>> What are your arguments for it?
>>>
>>> Here are mines against it:
>>>
>>> - it's slow
>>> - it affects systems where PAE is not needed
>>> - show me a system with 4G of RAM whose CPU is not 64bit-capable
>>>
>>
>> Supposedly, it is required to enable the NX bit on x86. On x86_64, it
>> isn't necessary. The NX bit is supposedly a "security feature". Here:
>> http://en.wikipedia.org/wiki/NX_bit
>>
>>
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