[lkml]   [2007]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Subject[PATCH 0/10] CPU hotplug error handling fixes
    This series of patches fixes the error handling for cpu hotplug.
    The problem is revealed by CPU hotplug/unplug test with fault-injection.

    The patch 1-3 are sysfs or driver core related error handling fixes.
    These are not directly related to cpu hotplug. But these are needed to
    pass the stress test.

    The patch 4 changes the behavior when one of the callbacks in notifier
    chain returns NOTIFY_BAD with CPU_UP_PREPARE event. This change makes
    cpu hotplug error handling simple.

    The patch 5 simplifies the cpu hotplug event handling in topology.c
    by the patch 4.

    The patch 6-10 are error handling fixes in cpu hotplug event callbacks.
    These fixes also depend on the change by the patch 4.

    Here is the test script I have confirmed with these patches.
    I guess we still have the similar bugs that I could not test due to no
    hardware. So it may be worth someone trying this script.

    ----------[ cut here ]----------



    bash -c "echo 1 > /proc/self/make-it-fail && exec $*"

    [ "$UID" == 0 ] || exit 1
    [ -n "$FAILTYPE" -a -f /debug/$FAILTYPE/probability ] || exit 1
    [ -f $CPU_ONLINE ] || exit 1

    echo N > /debug/$FAILTYPE/ignore-gfp-wait
    echo Y > /debug/$FAILTYPE/task-filter
    echo 1 > /debug/$FAILTYPE/probability
    echo -1 > /debug/$FAILTYPE/times

    while true
    faulty_system "echo 0 > $CPU_ONLINE"
    faulty_system "echo 1 > $CPU_ONLINE"

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-07-16 16:03    [W:0.026 / U:3.496 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site