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View Full Version : SMP, HyperThreading, and 2.6.x



mcelroyj
21st July 2004, 06:04 AM
I just upgraded to FC2 and I've noticed that on all but the stock kernel (the kernel that FC2 ships with), if I try to boot using an SMP kernel, I get a kernel panic. Does the 2.6.x kernel family incorporate HyperThreading in the single CPU builds, or will I need to custom compile my kernel in order to make full use of HyperThreading?

Ug
21st July 2004, 07:34 AM
The default kernel which is installed and selected by grub for a hyperthreading machine should be the SMP kernel. FC2 provides two kernels to those with hyperthreading, a multiprocessing one and a non-multiprocessing one.

So you may be missing the hyperthreading RPM package, if you look on your first Fedora CD you should find the kernel package. You'll want to install the package which is entitled kernel, with i686 and SMP in the name. Issue a
rpm -ivh <package name>for best results.

mcelroyj
21st July 2004, 07:54 AM
Interesting... In order to better explain, I need to find the error message that get or else copy it down. Where would I find a log of all the super ugly boot messages I see before the init loader kicks in?

Viro
21st July 2004, 11:03 PM
Have a look in /var/log/messages