Re: [coLinux-users] Re: [coLinux-devel] colinux-0.6.2-pre1 crashed on athlon 64

[<sl...@bl...>]

Nuno Lucas <lu...@nl...> writes:

> Joe Wells, dando pulos de alegria, escreveu :
> > Is this an issue only for AMD CPUs or does it also affect some Intel
> > CPUs?
> > I've tried to follow this thread on the mailing lists and it is not
> > clear to me what conclusion to draw.
> >
> 
> To make it clearer, the problem can be triggered with any Pentium
> II/III/IV and the old Pentium Pro. And any compatible AMD that
> implements the PAE mechanism (Physical Address Extensions).
> 
> Windows doesn't enable PAE unless explicitely ordered to (with the /PAE
> switch), but in order to use DEP/NX, the processor needs to be run with
> PAE enabled (to have 64 bits page tables, instead of 32 bits).

Where is the "/PAE" switch supplied?  How can I tell if it is on?  How
can I tell if my machine has DEP/NX (and what is this anyway?)?

I'm currently afraid to upgrade to SP2 (it's just sitting on my hard
disk waiting for me to click on the little icon in the tray) because I
don't understand the implications of this issue.

Thanks for any advice you can supply!

-- 
Joe

> So, on Amd64 processors (and maybe Intel Ithanium, not sure about this),
> the bug will be triggered as soon as one enables the SP2 DEP/NX feature,
> but because PAE is also enabled.
> 
> What is not tested yet is if, after correcting the PAE issue, it will
> have problems with the DEP/NX one. But the second should be easy enough
> to solve.
> 
> 
> Regards,
> ~Nuno Lucas
> 
> 
> 
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