On Sun, May 12, 2013 at 08:19:34PM +0200, Bjørn Mork wrote:
> "Paul E. McKenney" <[email protected]> writes:
> > On Sun, May 12, 2013 at 05:55:00PM +0200, Bjørn Mork wrote:
> >> "Paul E. McKenney" <[email protected]> writes:
> >> > On Sun, May 12, 2013 at 11:08:50AM +0200, Bjørn Mork wrote:
> >> >> Hello,
> >> >>
> >> >> got the splat below when running powertop on plain v3.10-rc1
> >> >> (i.e. without my previously mentioned revert patch or any other extra
> >> >> patches). Config attached.
> >> >
> >> > OK, it looks like you have context-tracking enabled, so you might be
> >> > hitting a bug that Steven Rostedt found a few days ago. Could you
> >> > please try out his fix below?
> >>
> >> Thanks for the quick reply, but I'm afraid that patch had no effect on
> >> the warning I got. It's still there.
> >
> > Other than wondering whether powertop has issues similar to the bug
> > Steven Rostedt located, I must confess myself clueless. Here are some
> > diagnostics I can suggest:
> >
> > 1. Run in 32-bit mode. This disables some of the new adaptive-ticks
> > functionality, so might give a probabilistic indication of where
> > the bug lies.
> >
> > 2. The standard fallback of bisection.
> >
> > Would you be willing to do either of these?
>
> Willing, yes. But it will take some time before I am able to do either
> unless I can recreate the problem in a virtual machine. I assume that
> you by " 32-bit mode" mean a 32bit kernel? I'm not exactly set up to
> run that on my laptop. Bisection will be less work.
>
> To be honest, I don't even know how old this thing is. It could be
> totally unrelated to your recent changes for all I know. Running
> powertop is something I do once every 6 kernel releases or something
> like that...
>
> I'll see what I can come up with. Thanks for your attention.
And thank you for the testing and information!
Thanx, Paul
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