Red Hat Bugzilla – Bug 182640
SMP enabled in Uniprocessor kernel
Last modified: 2007-11-30 17:11:25 EST
Description of problem:
SMP is enabled in Uniprocessor kernel -- leading to problems with drivers that
don't work with SMP.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install kernel-2.6.15-1.1831_FC4
SMP is enabled (as seen in kernel .config)
SMP disabled for uniprocessor kernel
This has been discussed before. The performance loss from running SMP on a UP
x86_64 machine is negligable.
(In reply to comment #1)
> This has been discussed before. The performance loss from running SMP on a UP
> x86_64 machine is negligable.
Yes, but it's causing havoc with my WiFi driver (RaLink) -- resulting in a
system that won't boot. Why enable it if it's not going to be used anyway? I'm
sure I'm not the only one who wants to use a Uniprocessor kernel just to get a a
piece of hardware going that won't work with SMP enabled kernels..
actually, this was a regression in FC4 that is being reverted in the next update
(should be ready next week).
Ignacio's comment only applies to rawhide/FC5 onwards.