Messages in this thread | | | Date | Thu, 20 Sep 2012 14:58:01 +0200 | From | Borislav Petkov <> | Subject | Re: kernel BUG at kernel/sched/core.c:1465! |
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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.
Thanks for pointing this out.
-- Regards/Gruss, Boris.
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