[CentOS] Kernel ELsmp vs EL

Sudev Barar sbarar at gmail.com
Thu Sep 7 03:45:25 UTC 2006

On 07/09/06, Jim Perrin <jperrin at gmail.com> wrote:
> On 9/6/06, Sebastien Tremblay <sebastien.tremblay at au.cmpmedica.com> wrote:
> > Hi all,
> >
> > I'm not very used to CentOS and Linux generally speaking, though I read
> > a lot and 'man' quickly became a very good friend of mine, right after
> > Google, so sorry if that's a ridiculous one! (at least it'll give you a
> > good laugh!)
> >
> > I updated the kernel to 2.6.9-42.0.2 recently and that raised a
> > question... Simple... Yet silly...! What exactly is the difference
> > between 2.6.9-42.0.2EL and 2.6.9-42.0.2ELsmp? It seems the default
> > install was the 'smp' kernel, but as I had to change the grub config I
> > stumbled across this one and... started wondering...
> SMP is for dual processor (or dual core) systems. The default EL
> kernel is for a single processor system, but is installed as a
> failsafe kernel on smp systems "just in case".

AFAIK running smp kernel on a single core machine with hyper threading
switched on is also good idea.
Sudev Barar

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