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    SubjectRe: kernel BUG at kernel/sched/core.c:1465!
    On 09/20/2012 08:58 PM, Borislav Petkov wrote:
    > On Thu, Sep 20, 2012 at 02:38:47PM +0800, Michael Wang wrote:
    >> Could you please try below patch and see whether the new WARNING
    >> appear or not?
    >>
    >> And cc Tejun Heo <tj@kernel.org> since wq_worker_sleeping() doesn't
    >> work as it's introduced...
    >
    > Ok, now that you mentioned workqueues, I remember the powernow-k8
    > workaround from Tejun a couple of days ago and looking at Linus' tree
    > from today, he actually merged a fix for exactly that:
    >
    > commit c5c473e29c641380aef4a9d1f9c39de49219980f
    > Merge: 925a6f0bf8bd 6889125b8b4e
    > Author: Linus Torvalds <torvalds@linux-foundation.org>
    > Date: Wed Sep 19 11:00:07 2012 -0700
    >
    > Merge branch 'for-3.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
    >
    > Pull workqueue / powernow-k8 fix from Tejun Heo:
    > "This is the fix for the bug where cpufreq/powernow-k8 was tripping
    > BUG_ON() in try_to_wake_up_local() by migrating workqueue worker to a
    > different CPU.
    >
    > and this is exactly the same BUG_ON I'm hitting. and powernowk8_target
    > is in the stack trace so it has to be the same issue.
    >
    > I'll update my tree to latest Linus and retest.

    Happen to see the problem solved.

    Regards,
    Michael Wang

    >
    > Thanks for pointing this out.
    >



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