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SubjectRe: hung tasks in 3.18.0-rc1-00221-gc3351df
> > > rcu: Make rcu_barrier() understand about missing rcuo kthreads
> >
> > I can not trigger the previous problem at will so my testing is not very
> > useful. I tested the previous patch that you sent but the problem did
> > not trigger, and yesterday applied this one and it still does not
> > trigger, but I an using remote sessions only for now (no desktop).
> >
> > At least it's not clearly broken :)
>
> A couple of other people had more reproducible test setups and confirmed
> that it fixed them.
>
> But yes, there are no doubt other RCU bugs waiting to be found. ;-)

I reproduced the problem on Thinkpad T400 with Core2Duo and Chromium
startup failing, and your patch fixes that.

Tested-by: Meelis Roos <mroos@linux.ee>

--
Meelis Roos (mroos@linux.ee)


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