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Add a note about MPTABLE_FORCE_HTT.

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Prompted by:	John Stockdale <jstockdale@stanford.edu>
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John Baldwin 2003-12-10 15:59:20 +00:00
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commit c53a5d8fb8
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@ -50,6 +50,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
netgraph to boot need to make sure to have world and kernel in
sync before rebooting.
20031111:
Hyperthreading logical CPU's are no longer probed by default
when using the MP Table. If ACPI is being used, then logical
CPUs will be probed if hyperthreading is enabled in the BIOS.
If ACPI is not being used and hyperthreading is enabled in the
BIOS, logical CPUs can be enabled by building a custom kernel
with the option MPTABLE_FORCE_HTT enabled.
20031103:
The i386 APIC_IO kernel option has been replaced by
'device apic'. The ACPI module has also been temporarily