K 10 svn:author V 3 jhb K 8 svn:date V 27 2003-10-22T19:04:09.000000Z K 7 svn:log V 515 MFC: Always enable hyperthreading to avoid lockups due to APIC interrupt routing problems. - Enable cpu_idle_hlt for the SMP case by default since that significantly helps HTT performance. - Provide a facility for disabling individual CPUs by refusing to schedule processes on them. - Use the above to provide a sysctl for disabling or enabling all logical CPUs. The default is to disable all logical CPUs. - Remove the 'HTT' kernel option now that it is obsolete. Submitted by: ps Approved by: re (murray) END