[rhn-users] RedHat ES 3.0 - kernel problem

[Bret McMillan]

On Wed, Mar 24, 2004 at 10:27:26AM -0500, Bret McMillan wrote:
> On Wed, Mar 24, 2004 at 10:14:53AM +0100, espen.ekeroth at om.com wrote:
> 
> > The RedHat ES 3.0 is shipped with 2 different kernels:
> > 
> > 2.4.21-9.EL
> > 2.4.21-9.EL.smtp
> > 
> > Our server is a Compaq DL360 with 1 CPU.
> > 
> > Default the installation uses the smtp version of the kernel. For me it
> > looks like the kernel is faking 2 CPU's - at least "top" shows 2 CPU's.
> 
> Probably a hyperthreaded cpu.
> 
> > What is the difference between the smtp kernel and the "normal" kernel?
> 
> That I don't know, another lurker might... :/

/me chuckles... that'll teach me to respond before my morning
caffiene.  You're probably talking about the SMP kernel which is used
when you have 2+ cpus.  Since w/ a hyperthreaded box you have at least
2 virtual cpus reported to the os, you can use the SMP kernel.

Your mileage may vary with it.  You can just boot into the
uniprocessor kernel or you can disable HT in your bios (usually) if
you want to test your machine out sans-HT.

--Bret