O.S. not seeing both C.P.U.'s O.S. from old installation.

lindylex · 05-07-2009, 02:05 PM

I recently moved my Debian OS to another computer with two C.P.U's. The O.S. starts up fine but it does not see both C.P.U.'s. Is there a way to reset, enable this to recognize both C.P.U.'s? The O.S. Was not reinstalled and is the O.S. from the old computer. The old computer had one CPU. I would like to avoid reinstalling the O.S.

These are the specs of the new computer.

motherboard: SUPER P6DGE
C.P.U.: two Pentium III at 1000 MHZ
memory: 512 M
Thanks

BrianK · 05-07-2009, 02:46 PM

what kernel are you running? (uname -a). If it's an old enough install, you may have a UP kernel & need an SMP kernel.

lindylex · 05-07-2009, 03:07 PM

BrianK this is my Kernel information 2.6.26-1-486 #1 Sat Jan 10 17:46:23 UTC 2009 i686 GNU/Linux

lindylex · 05-07-2009, 03:14 PM

BrianK, I assume I need to build a kernel and configure the kernel and check a star next to Symmetric multi-processing support. Does this sound about right to you?

syg00 · 05-07-2009, 04:48 PM

I would have thought SMP would be the default these days. I don't do Debian, but in Ubuntu when separate kernel were shipped, this was handled via the 686 indicator.
The 386 (?) kernels were configured as uniprocessor, 686 as SMP. I presumed this originated from the Debian base build.

Try this command against your running config to see what you have currently configured

Code:

grep -iE "smp|nr_cpus" your_config_file

lindylex · 05-08-2009, 03:24 AM

[SOLUTION SOLVED]
syg00, I rebuild the kernel and enabled "Symmetric multi-processing support" and now things are just flying! If you are reading this and you are using Debian, Ubuntu or any Debian derivative you can use this link on how to build and install a Kernel.

http://www.howtoforge.com/kernel_com...on_debian_etch

Thanks for the help syg00. I figured it out when you mentioned "...(uname -a). If it's an old enough install, you may have a UP kernel & need an SMP kernel."

Thanks, Lex

syg00 · 05-08-2009, 04:12 AM

That was BrianK you should be thanking.
I would have thought .26 was recent enough to be SMP by default.