Re: moving from 3.16-3-486 to 686
Hi.
On Mon, Nov 24, 2014 at 12:35:46PM -0500, Harry Putnam wrote:
> Pascal Hambourg <pascal@plouf.fr.eu.org> writes:
>
> > Harry Putnam a écrit :
> >>
> >> My question is whether continuing to use the 486 versions of kernels
> >> has any down sides?
> >
> > The -486 kernel lacks support for multiprocessing/hyperthreading and PAE
> > (which is required for NX/XD bit).
>
> I see in my latest `full-upgrade' that I've now gone to a 586 kernel:
>
> uname -r 3.16.0-4-586
>
> I did nothing purposely to make that happen but there it is.
>
> Does your comment about "multiprocessing/hyp ..." hold true for 586 as
> well?
That kernel's config file has:
# CONFIG_SMP is not set
That means no multiprocessor support (i.e. a single CPU core will be
used all the time regardless of their actual number).
> Oh, and what is `NX/XD'?
https://en.wikipedia.org/wiki/NX_bit
It's considered a good thing to have one in CPU generally, as
implementing said bit in-kernel will hurt performance.
Reco
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