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    Subject[REGRESSION] clockevents patch causes hang on power off
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    I'm having trouble with my PC crashing just as it's attempting to power off.
    I managed to git bisect to this commit:

    clockevents: Prevent clockevent_devices list corruption on cpu hotplug
    bb6eddf7676e1c1f3e637aa93c5224488d99036f

    http://patchwork.kernel.org/patch/71157/

    I've tested with 2.6.33-rc5 with and without this patch to confirm
    everything works when I revert the patch.

    I managed to copy down some of the output, but if need be I can try
    hooking up the serial port.

    Call Trace:
    ? hrtimer_cpu_notify+0x8a/0x152
    ? timer_cpu_notify+0x224/0x23b
    notifier_call_chain+0x2b/0x4a
    raw_notifier_call_chain+0xc/0xe
    _cpu_down+0x16d/0x237
    disable_nonboot_cpus+0x5f/0xe6
    kernel_power_off+0x1d/0x34
    sys_reboot+0xf2/0x150
    sched_clock_local+0x17/0x104
    set_next_entity+0x31/0x9c
    finish_task_switch+0x33/0x68
    schedule+0x76a/0x7b8
    mntput_no_expire+0x19/0xb3
    filp_close+0x51/0x5b
    sysenter_do_call+0x12/0x22

    EIP: clockevents_notify+0x97/0xd7 SS:ESP 0068:f6737de8

    In case /proc/cpuinfo is useful, I've included that below:

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 15
    model : 2
    model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
    stepping : 9
    cpu MHz : 2793.365
    cache size : 512 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 1
    apicid : 0
    initial apicid : 0
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
    pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid
    xtpr
    bogomips : 5586.73
    clflush size : 64
    cache_alignment : 128
    address sizes : 36 bits physical, 32 bits virtual
    power management:

    processor : 1
    vendor_id : GenuineIntel
    cpu family : 15
    model : 2
    model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
    stepping : 9
    cpu MHz : 2793.365
    cache size : 512 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 1
    apicid : 1
    initial apicid : 1
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
    pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid
    xtpr
    bogomips : 5584.85
    clflush size : 64
    cache_alignment : 128
    address sizes : 36 bits physical, 32 bits virtual
    power management:

    Regards,
    Nathan


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