https://bugzilla.kernel.org/show_bug.cgi?id=15924


Len Brown <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected]
          Component|Config-Interrupts           |Other
         AssignedTo|[email protected]         |[email protected]
                   |                            |.org




--- Comment #7 from Len Brown <[email protected]>  2010-05-10 06:59:39 ---
> /sys/firmware/acpi/interrupts/gpe01:  246416  enabled

GPE01 appears to be the problem

Does the kacpid thrashing stop after this?

# echo disable > /sys/firmware/acpi/interrupts/gpe01
# cat /sys/firmware/acpi/interrupts/gpe01

> Device  S-state   Status   Sysfs node
> LANC      S0    *disabled  pci:0000:00:19.0
> HDEF      S3    *disabled  pci:0000:00:1b.0
> EHC1      S0    *disabled  pci:0000:00:1d.0
> EHC2      S0    *disabled  pci:0000:00:1a.0
> ...

All of the devices in /proc/acpi/wakeup have the
run_wake flag set in 2.6.34, while none had this set in 2.6.33

It should be possible to bisect which commit caused this regression,
particularly if the bisect is limited to the PCI and ACPI code.

GPE01's handler seems to be involved in PCI hotplug notifies:

        Method (_L01, 0, NotSerialized)
        {
            Add (L01C, 0x01, L01C)
            \_SB.PCI0.RP01.HPLG ()
            \_SB.PCI0.RP02.HPLG ()
            \_SB.PCI0.RP03.HPLG ()
            \_SB.PCI0.RP04.HPLG ()
            \_SB.PCI0.RP05.HPLG ()
            \_SB.PCI0.RP06.HPLG ()
        }

It isn't immediately clear from the AML how the handler
clears the event that caused the interrupt.

BTW. there seem to be checksum errors in the acpi tables,
please attach the full output from acpidump

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