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    SubjectRe: Linux 3.4 released
    Yong Zhang wrote, on 05/23/12 08:34:
    > On Tue, May 22, 2012 at 09:50:10PM +0200, J�rg-Volker Peetz wrote:
    >> Tejun Heo wrote, on 05/22/12 20:35:
    >>> Hello,
    >>>
    >>> On Tue, May 22, 2012 at 11:26 AM, J?rg-Volker Peetz <jvpeetz@web.de> wrote:
    >>>> Also with this second patch I wasn't able to see any output beginning with "XXX
    >>>> delayed_work_timer_fn:". It should appear in the system log or on the text-console?
    >>>
    >>> Hmmm... it should appear on the console but your printk setting might
    >>> be different. Can you please prepend KERN_CRIT before the printk
    >>> format string? So that it looks like printk(KERN_CRIT "XXX: ...").
    >>>
    >>> Thanks.
    >>>
    >>
    >> Hello,
    >>
    >> no, changing to printk(KERN_CRIT "XXX: ...", ...) in kernel/workqueue.c didn't
    >> print anything I could read. Would it appear before the "panic screen"? But I'm
    >> not able to scroll back.
    >> The Panic screen starts with
    >>
    >> BUG: Unable to handle kernel NULL pointer dereference at 0000000000000008
    >> IP: [<ffffffff8103eef1>] delayed_work_timer_fn+0x13/0x70
    >>
    >> and the Call Trace with
    >>
    >> Call Trace:
    >> <IRQ>
    >> [<ffffffff81056fbf>] ? ktime_get+0x5f/0xf0
    >> [<ffffffff810342c6>] ? run_timer_softirq+0x106/0x220
    >> [<ffffffff8105cc44>] ? tick_handle_oneshot_broadcast+0xc4/0xe0
    >>
    >> Do I need special settings in the kernel config?
    >
    > Maybe you can enable CONFIG_DEBUG_OBJECTS_WORK and give another try.
    >
    > Thanks,
    > Yong
    >

    Hello,

    with the patch of Tejun Heo and CONFIG_DEBUG_OBJECTS_WORK enabled via "make
    nconfig" doesn't show any output line beginning with "XXX".

    --
    Best regards,
    Jörg-Volker.

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