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single to multi processor

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single to multi processor Linux Help forum discussing topics including usage, troubleshooting, modules, and distributions. Linux is an open source OS, based on UNIX.

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  #1  
Old September 17th, 2002, 10:22 PM
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single to multi processor
Hi,
I have a server where I loaded linux when it was only 1 processor, and have since added a second (both P3 1 Ghz). Both processors register in the BIOS and POST checks, but does not show up in /proc/cpuinfo.

I've installed the smp kernel after the fact, but doesn't seem to help. Any suggestions how I can fix this? I am running RH 7.3

Thanks,
-jp
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  #2  
Old September 17th, 2002, 10:26 PM
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what does uname -a return to you? Please post the exact string.
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Old September 17th, 2002, 10:28 PM
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Linux localhost 2.4.18-3 #1 Thu Apr 18 07:37:53 EDT 2002 i686 unknown
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Old September 17th, 2002, 10:38 PM
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As I thought, you aren't using the SMP kernel. You have to make sure you've booted to it by choosing or adding it to lilo or grub, whatever bootloader you've chosen.

If you were using the SMP kernel, the output of uname -a would look like
Code:
Linux localhost 2.4.18-3smp #1 Thu Apr 18 07:37:53 EDT 2002 i686 unknown


because redhat suffixes the kernel version of their SMP kernels with "smp"
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Old September 17th, 2002, 10:39 PM
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I noticed the same thing.. but this is what got me hung up..

# rpm -qa |grep kernel
kernel-smp-2.4.18-3
kernel-2.4.18-3
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Old September 17th, 2002, 10:52 PM
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Great. But you have to boot the smp kernel to use it, just having the RPMs installed doesn't mean anything. You could have any number of different kernels, including different versions, if you wanted.

Read the LILO or grub docs about how to add a new kernel image to your bootloader, it's pretty easy.
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