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Re: Disabling ACPI also implicitly disables SMP support for Intel Atom chips?
On Wed, Mar 04, 2009 at 05:18:23PM -0500, Jared D. McNeill wrote:
> David H. Gutteridge wrote:
> >Hi all,
> >Is it a given that disabling ACPI also disables SMP (well, really SMT,
> >technically) with Intel Atom chips? (Or others?) The i386 boot prompt
> >offers the choice of disabling ACPI only, but when I choose it on my
> >LG X110 netbook, the kernel doesn't recognize the HT capabilities of
> >the CPU. In order to get SMP, I have to enable ACPI. Is this
> >something I should PR, or is it just the nature of things here? (This
> >is with 5.0 RC2, incidentally.)
> Does your motherboard have MP BIOS extensions (the fallback when ACPI
> isn't enabled)? I suspect not.
I have found that the trend is to report HT via ACPI but not via MPBIOS.
Dual cores tend to show up via MPBIOS.
David, what's the issue with ACPI?
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