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    SubjectRe: APIC Error when doing apic_pm_suspend
    Zwane Mwaikambo writes:
    > I get an APIC error 0x40 when resuming from an apm -s. If i'm correct
    > that would be an illegal register access wouldn't it? I tried putting
    > enter/exit printks in the apic_pm_resume/suspend functions and it showed
    > that both returned before the APIC error printk. Is there anyway of finding out
    > which register access it was? I "thought" it would be one of the
    > apic_writes in the pm functions but looks like i might be wrong.
    > The kernel is compiled with local APIC and gets detected and enabled on
    > boot (UP machine).

    No, 0x40 is an illegal vector error. It's a (semi-) known quirk in the P6 family
    of processors that you get this error when writing a null vector to any of the
    LVT entries, even if you are also setting the mask bit at the same time.
    Both the clear_local_APIC() call at PM suspend and the reinitialisation at PM
    resume can trigger this.

    The "error" is mostly harmless. Ignore it for now, I'll do a patch to silence it later.

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      Last update: 2005-03-22 13:13    [W:0.020 / U:3.108 seconds]
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