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    SubjectRe: [Bug #12409] NULL pointer dereference at get_stats()
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    Hello.

    Frederik Deweerdt wrote:
    > On Mon, Jan 19, 2009 at 10:45:43PM +0100, Rafael J. Wysocki wrote:
    > > This message has been generated automatically as a part of a report
    > > of regressions introduced between 2.6.27 and 2.6.28.
    > >
    > > The following bug entry is on the current list of known regressions
    > > introduced between 2.6.27 and 2.6.28. Please verify if it still should
    > > be listed and let me know (either way).
    > >
    > >
    > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12409
    > > Subject : NULL pointer dereference at get_stats()
    > > Submitter : Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
    > > Date : 2008-12-30 12:53 (21 days old)
    > > References : http://marc.info/?l=linux-kernel&m=123064167008695&w=4
    > > Handled-By : Frederik Deweerdt <frederik.deweerdt@xprog.eu>
    > >
    > >
    > Hello Rafael,
    >
    > Not sure what the status should be for that one, it sure seems vmware
    > related, and I don't have one handy.
    >
    > Regards,
    > Frederik
    >
    The latest post regarding this problem starts at http://lkml.org/lkml/2009/1/4/349 .
    It's not a VMware related problem.

    A patch at http://lkml.org/lkml/2009/1/5/557 reported that "nolapic" option
    doesn't prevent for_each_possible_cpu() from reaching CPU1, and per-CPU pointer
    for CPU1 is NULL.



    --- First call of for_each_possible_cpu() ---
    Entering get_stats()
    CPU=0
    Leaving get_stats()

    --- Second call of for_each_possible_cpu() ---
    Entering get_stats()
    CPU=0
    CPU=1
    lb_stats == NULL for CPU 1
    Leaving get_stats()



    Regards.


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