[Bugme-new] [Bug 34042] New: kworker consumes ~100% CPU on HP Elitebook 8540w after resume (again)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=34042

           Summary: kworker consumes ~100% CPU on HP Elitebook 8540w after
                    resume (again)
           Product: ACPI
           Version: 2.5
    Kernel Version: 2.6.39_rc5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Config-Interrupts
        AssignedTo: acpi_config-interrupts at kernel-bugs.osdl.org
        ReportedBy: kernel at feystorm.net
                CC: rjw at sisk.pl
        Regression: No


This is the *exact* same problem as in bug 29722, with the exact same laptop.

The patch that solved the problem in bug 29722 is in 2.6.39_rc5, so there is
apparently another cause.


When resuming from standby, kworker starts consuming almost all of the
available CPU, while /sys/firmware/acpi/interrupts/gpe_all starts increasing at
a rate of about 6000 per second.

Kernel is built without CONFIG_HOTPLUG_PCI_PCIE and with
CONFIG_HOTPLUG_PCI_ACPI=y


Attachments of a lot of the info requested in bug 29722 forthcoming.

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