Kernel Configuration - Part V

Today, we’re going to look at how to configure your kernel for a specific processor. Why would you need to do that? Let’s talk …

Each processor type uses a bit different code set. AMDs vary from Pentiums both at the physical manufacturing process level and in the instruction sets. Linux is simply the only OS that contains precisely the right instruction sets for each type of processor. Is this a necessary configuration in your kernel? Not really. You can use the generic i386, i486, i586, or i686 configurations with little concern. However, if you’re looking to tweak your kernel to its most optimum performance, you’re far better off choosing the right processor type for your system. Your system will run measurably faster and more efficiently.

The other critical element of the processor type and features configuration for your kernel is math emulation. This is most important if you’re converting an old box to Linux. If your system does not have a math coprocessor, and you don’t choose math emulation in this section, your system will not boot. The same may be said of choosing the wrong processor type, short of selecting the generic ixxx types.

As is most often the case, the other defaults in this section are targeted for the widest array of machines. In other words, if you’re not sure of the configuration in a specific element of processor types and features, the default should work fine.

Tomorrow, it’s on to the General Setup section of your kernel configuration.