Re: [kernel 3.13.0-06058-g2d08cd0] Strange ACPI error messages

Rafael J. Wysocki
2014-01-25T13:44:55Z

On Saturday, January 25, 2014 02:53:24 PM Rafael J. Wysocki wrote:
> On Saturday, January 25, 2014 11:03:09 AM Jörg Otte wrote:
> > Kernel 3.13.0-06058-g2d08cd0 displays following errors on the console:
> >
> > ACPI: \_PR_.CPU4: failed to get CPU APIC ID.
> > ACPI: \_PR_.CPU5: failed to get CPU APIC ID.
> > ACPI: \_PR_.CPU6: failed to get CPU APIC ID.
> > ACPI: \_PR_.CPU7: failed to get CPU APIC ID.
> >
> > I don't have CPUs 4..7! Error messages regarding not existing
> > CPUs should not be displayed.
> > kernel 3.13.0-05617-g3aacd62 and before did'nt show this messages.
> >
> > This is a regression. I never saw this messages before.
>
> Does your system show any other suspicious symptoms or are you worried about
> those messages only?

Gerry, this is your commit b981513f806d (ACPI / scan: bail out early if failed
to parse APIC ID for CPU). Apparently, the BIOS has room for 4 CPUs more than
there actually are in the system. Maybe we can reduce the log level of those
messages to avoid ringing bells unnecessarily?

Rafael