>> > Since 2.6.15 smp doesn't work anymore without ACPI
>> > May be possible to have a note in "Symmetric multi processing
>> > support" help dialog? Or is it possible to enable ACPI when
>> > SMP is selected?
>>
>>It's probably specific to your system, nothing general.
>
>Hi Andi,
>
>Thanks for the reply. I'm compiling linux on a pentinum
>4 HT 3GHz. 2.6.14 did detect both processor, but all
>kernels > 2.6.15 did not. (at least till 2.6.17.7)
CONFIG_ACPI=y is necessary to parse the ACPI tables
and discover HT siblings. Except for the rare BIOS
that gives the option to enumerate HT via MPS
(thus breaking some versions of Windows),
enabling ACPI is the only way to enable HT.
Yes, in the distant past, CONFIG_ACPI=n did not remove
all ACPI code from your kernel, and that was a bug.
thanks,
-Len
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