Hello, guys. On Thu, Sep 20, 2012 at 02:58:01PM +0200, Borislav Petkov wrote: > commit c5c473e29c641380aef4a9d1f9c39de49219980f > Merge: 925a6f0bf8bd 6889125b8b4e > Author: Linus Torvalds <[email protected]> > 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.
Yeah, it's powernow-k8 migrating kworker to a different CPU. It's really curious that there are multiple reports of this in this cycle. Nothing on workqueue side has changed and powernow-k8 has been broken for very long time. The only way this can get triggered is by contending on fidvid_mutex in powernow-k8. I suppose something changed in such way that this happens with some regularity. Have no specific idea what. Anyways, mainline should be okay now. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
