Comment # 27 on bug 925961 from Rui Zhang

(In reply to Jean Delvare from comment #26)
> Rui, thanks for looking into this.
> 
> I am not familiar enough with the thermal subsystem to review your patches.
> Also I don't own an Acer laptop myself so I can't test if they would solve
> the problem that was reported here. But I have to say I have some doubts
> that they would actually help. My understanding of the problem is that the
> acerhdf wanted to be called back even when the step_wise governor considered
> that no change in cooling was needed, and the optimization broke that
> mechanism/assumption.
> 
> If you believe that the problem would actually be solved by your patches,
> please explain how, as it isn't obvious to me. This is mostly theoretical
> though, as I don't think that your 3 patches qualify for stable kernels.
> They are large and somewhat intrusive, so they could come with regressions
> or side effects. I wouldn't take the risk of applying them to the openSUSE
> 13.2 kernel. Reverting the optimization as I did feels much safer.
> 
> I did send a patch reverting 178c2490b99f898efc06d1ad75cadc84f13021a6 to the
> stable kernel mailing list, with suggestion to apply it to kernel branches
> v3.12 to v3.17. You were Cc'd.

Yes, IMO, the patch should be applied to all stable kernel as it is actually a
bug in step_wise governor. and I will rework the three patches above on top of
the fix then.
can you please resend with cc: all stable kernel?