[Lubuntu-qa] Xubuntu reverting to non-pae kernel?

[Ali Linx (amjjawad)]

Hi,

Thanks to Wikipedia, I think I understand what does PAE mean and what dose
SMP mean. However, I'm confused after reading this discussion. I've seen
many emails and threads about the PAE and NON-PAE Kernel but didn't go
through all to be honest because the first few lines didn't make any sense
too me at that time but now, I'm interested to understand and learn what is
going on and above all, how "exactly" that may effect "Lubuntu" as I'm not
that interested about other flavors as much as I'm interested about Lubuntu.

So far, this is what I understood:
1- Ubuntu Kernel Team will support NON-PAE Kernel in 12.04 which is an LTS
which will be supported for 5 years.
2- Ubuntu Kernel Team will drop the support for NON-PAE Kernel in 12.10
because 12.04 will be supported for 5 years and that is enough in their
opinion.
3- PAE Kernel will be the default in Ubuntu 12.04 and NON-PAE is optional?

Now, if Lubuntu 12.04 by default will have the PAE Kernel, is the issue
that we may face is:

*The x86 PAE kernel, on the other hand, is a problem as it will not boot an
> all CPUs available in the last 10 years.  Most notably the Pentium M, of
> which there appears to be quite a few around.*
>

 Thus we need to follow Xubuntu Steps and go NON-PAE by default? am I right?

Thanks!

On Sat, Mar 17, 2012 at 11:13 PM, Yorvyk <yorvik.ubunto at googlemail.com>wrote:

> On Sat, 17 Mar 2012 12:37:48 -0400 (EDT)
> Paul Gorski <paul at gorski.info> wrote:
>
> >
> >  I am confused.
> >
> > Switch to Non-PAE to make the product more compatible with older
> hardware, but eliminate the non-SMP kernel and put the older hardware at a
> slight disadvantage?
> >
> > The only difference is that the users won't have the opportunity to
> choose non-SMP or SMP if the SMP version results in a small performance hit.
> >
> >
>
> There are two issues here.  The first is the PAE kernel which affects x86
> CPUs and the second SMP which effects PPC CPUs.
> The former is the more important.
> The SMP kernel works with G3 PPC onwards and causes a slight performance
> hit that is only really detectable via benchmarking.  In fact you'd be hard
> pushed to find a x86 distro that doesn't have an SMP kernel by default and
> very, very few have complained about performance problems.
> The x86 PAE kernel, on the other hand, is a problem as it will not boot an
> all CPUs available in the last 10 years.  Most notably the Pentium M, of
> which there appears to be quite a few around.
> If Xubuntu are going the non-PAE route, we will not be alone and therefore
> should go along with them.  This will have advantages come 12.10 when it is
> proposed to drop the non-PAE kernel.  We, Lubuntu and Xubuntu, may be able
> to produce some figures that would support keeping the non-PAE kernel.
>
>
> --
> Yorvyk
>
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-- 
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*amjjawad*
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