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Old 06-17-2002, 03:35 PM   #1
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Question Adding a 2nd CPU to RH7.3

Hi guys. I have RH7.3 installed on an intel box with a p3-1.26. Recently, I've popped in a second processor of the same.

BIOS confirms its there, my question is, do I need to reinstall RH, or is there some command I can run to verify the existance of my second processor being utilized by RH?

Old 06-17-2002, 05:34 PM   #2
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No, its a matter of you have the kernel pre-compiled for uniprocessors by the kids over at RH. I think, I've only ever run smp under slack. To find out for certain:

cat /proc/cpuinfo

if there are 2 chips up, there should be two entries.

If not, its a kernel re-compile. in /usr/src/linux/ Redhat put in a directory called config or some such with a bunch of .config files for different hardware setups. You can simply copy one of those up a directory level and compile that. Make certain to re-name the directory though so that when you compile the modules, they don't over-write the pre-existing /lib/modules folder. You want to keep that old kernel as a boot option in case something doesn't come out right.

Actually, if you've never done it, best to go over to linux-doc and read the kernel compiling how-to.


Old 06-19-2002, 08:39 AM   #3
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Thanks for the reply. It was most helpful. I think I'm just going to do a reinstall as I really hadn't had much set up on it that I couldn't live without.

Thanks again!

Old 06-20-2002, 02:06 PM   #4
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Hi jyusko. I've found that if you use the RPM command it can make installing another kernel very easy.

For instance, if you are currently running kernel-2.4.18-5, then to install the smp kernel, just download kernel-smp-2.4.18-5.i686.rpm and run the command:
rpm -ivh kernel-smp-2.4.18-5.i686.rpm
and it will install the smp version and even place it in Grub for you as a 2nd choice when you boot.

(this is assuming you'd want the 686 version [Pentium III class])
We have an official RH mirror where I work:
Old 06-22-2002, 11:10 AM   #5
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I run RH 7.2 on my duel 600. The new kernels all come with the default set for smp, and if I'm not wrong I think that the guys at RH also left it that way in RH7.3. So what you should do is go into the gnome menu, which I'm assuming you are running since it's Redhats default to run Gnome, then go to System and then to System information, if you see under CPU information, info about CPU 0 and CPU1, then that means that the kernel was by default set with SMP support, so you should feel very good about this. Otherwise, you do have to recompile your kernel, and I suggest you don't recompile by using rpms...rpms don't work always.



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