Re: ACPI oddity

[Bill Davidsen]

Brown, Len wrote:
> > On a HT system, why does ACPI recognize CPU0 and CPU1, refer 
> > to them as such in dmesg
>
>
> This is the Linux CPU number. ie the namespace where 0
> is the boot processor and the others are numbered in
> the order that they were started.
>
>
> > and then call them CPU1 and CPU2 in 
> > /proc/acpi/processor?
>
>
> These are arbitrary device identifiers written
> by the BIOS developer and foolishly advertised
> to the user by Linux.  The BIOS writer could have
> also called them ABC9 and XYZ4 and it would be
> equally valid.

Which explains why they are CPU1 and CPU2 on ASUS and CPU0 and CPU1 on 
another system. I was hoping I had found something for the person who 
was having problems with the P4P800 mobo, but looks like it's not here.
> We're planning to get rid of all the ACPI stuff
> in /proc and move to sysfs.  At that time we'll
> use device identifies that are deterministic,
> like cpu%d that /sys/devices/system uses today.

Whatever, it's cosmetic and there seem to be more important problems 
with APIC than /proc vs. /sys.

Thanks for the clarification.


--
   -bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
 last possible moment - but no longer"  -me
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