I was wondering about appropriate onconfig settings for Pentium 4 Xeon
processors with hyper-threading. Linux seems to treat a Pentium 4 Xeon
as two processors: when you cat /proc/cpuinfo you see twice as many CPUs
as you actually have.

So when setting up the VPCLASS parmater in onconfig should you treat a
single Xeon as one or two CPUs. I would guess two since the OS is
certainly reporting two to applications. Does anyone know for sure or
can anyone point me to an appropriate document on the subject?

I am using Linux 9.40.UC2 on SuSE Linux 9.0, kernel 2.4.21-166-smp4G,
glibc 2.3.2-87.

Also, is there any way of getting KAIO working with this combination.
The stock SuSE kernel supports this feature unlike the standard Linux
kernel. I have tried setting the KAIO environment variables but it
doesn't work so I imagine the answer is a no. This is afterall what the
release notes suggest.

Ben.