upgrading to an SMP kernel
Mike Pepe
lamune at doki-doki.net
Tue Oct 18 18:54:27 UTC 2005
Gordon Price wrote:
> Kind Folks,
>
> I am running into an issue that has me really bugged. I have one
> machine that has the *2.6.11-1.27FC3smp* kernel and another with the
> *2.6.11-1.27FC3* non-smp kernel. I need to use the smp version for a
> project that only works with this version of FC3 that uses a USB 2.0
> video device I designed. I have looked everywhere I know to figure out
> how to get the smp kernel on the non-smp machine, and I can not seem to
> back track the steps correctly.
>
> I have tried yum every which way but loose, and can not get an smp
> kernel period, to install or upgrade on the non-smp machine. Yum wants
> to upgrade me to 2.6.12, and I don't want to do that.
>
> On the machine that does not have the smp kernel, I tried copying all
> the smp files (4) that were in /boot on the smp machine to the /boot
> directory on the non-smp machine. I then added an entry in
> /etc/grub.conf for the smp kernel boot. This does not work at all. This
> issue makes me worry that Linux hard drives may be more difficult to
> move from machine to machine in a pre-configured format than I had
> wished????
>
> Specifically, how would you try to upgrade the non-smp machine to smp
> without trashing what is already on it??? Could Linux be looking at the
> hardware itself and deciding that maybe it can not support the smp
> version in the first place???
>
> Thanks,
>
> Gordon
>
Hi Gordon,
I hope I am correct in assuming you understand that the SMP (Symmetric
Multi-Processing) kernel is for machines that have two or more CPUs? (or
dual core CPUs)
You can boot the SMP kernel on a uniprocessor box, but it doesn't gain
you anything over the kernel compiled specifically for the single CPU.
-Mike
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