Eric Lee / smarc-fsl-linux-kernel

10 Apr, 2013

1 commit

31 Jul, 2012

1 commit

  • 8d4382881   fault-injection: notifier error injection ... Browse Code »

    This patchset provides kernel modules that can be used to test the error
    handling of notifier call chain failures by injecting artifical errors to
    the following notifier chain callbacks.

    * CPU notifier
    * PM notifier
    * memory hotplug notifier
    * powerpc pSeries reconfig notifier

    Example: Inject CPU offline error (-1 == -EPERM)

    # cd /sys/kernel/debug/notifier-error-inject/cpu
    # echo -1 > actions/CPU_DOWN_PREPARE/error
    # echo 0 > /sys/devices/system/cpu/cpu1/online
    bash: echo: write error: Operation not permitted

    The patchset also adds cpu and memory hotplug tests to
    tools/testing/selftests These tests first do simple online and offline
    test and then do fault injection tests if notifier error injection
    module is available.

    This patch:

    The notifier error injection provides the ability to inject artifical
    errors to specified notifier chain callbacks. It is useful to test the
    error handling of notifier call chain failures.

    This adds common basic functions to define which type of events can be
    fail and to initialize the debugfs interface to control what error code
    should be returned and which event should be failed.

    Signed-off-by: Akinobu Mita
    Cc: Pavel Machek
    Cc: "Rafael J. Wysocki"
    Cc: Greg KH
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: Michael Ellerman
    Cc: Dave Jones
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita