New interrupt stuff breaks ASUS 2 CPU system

John Baldwin jhb at
Tue Nov 4 07:38:10 PST 2003

On 04-Nov-2003 Claus Guttesen wrote:
> Hi.
>> I have an ASUS system with 2 CPUs that I need to run
>> at HZ=10000. This
>> worked until yesterday, but with the new interrupt
>> code it doesn't boot
>> anymore. It works for the standard HZ, but if I set
>> HZ=1000 I get a double
> Compiled a new kernel with source from Nov. 3'rd where
> SMP and APIC had to be enabled to use SMP. A make
> kernel would complete in 10 min's.
> So I cvsupped to test the 'interrupt stuff' and
> recompiled. Upon boot it seemed that it only saw one
> of my two Xeons at 2.4 Ghz. Hypert. was enabled as
> default. So I reverted to the source the day before.
> I also have an ASUS motherboard with an Intel 875P
> chipset.

Can you post a dmesg?  Note that if you want hyperthreading,
you need to enable it in your BIOS.  The ACPI (and soon the
MPTable) drivers will not use HT CPUs unless HT is enabled in
the BIOS.  My test machines with HT used the 865 chipset.


John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve!"  -

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