hwpstate_intel hangs kernel

[Conrad Meyer]

Hi Andrey,

Please try 'hint.hwpstate_intel.0.disabled="1"' as a workaround for now.

I think I have identified at least one problematic piece of code,
although I don't know if it's the root cause.  I will go ahead and fix
that, which may not fix the hang, and also add some debug printfs that
can be enabled to help identify the real issue.

Thanks for the report and bisect.

Best,
Conrad

On Sat, Feb 1, 2020 at 6:06 AM Andrey V. Elsukov <bu7cher at yandex.ru> wrote:
>
> 31.01.2020 18:11, Andrey V. Elsukov пишет:
> > On 24.01.2020 19:52, Andreas Nilsson wrote:
> >> It hangs during kernel boot and the last message printed on console is:
> >> hwpstate_intel0: <Intel Speed Shift> on cpu0
> >
> > Hi,
> >
> > Did you find the cause of this hang?
> > I also tried to update today from r350816 to r357330. But my Lenovo X1
> > Carbon 4th hangs on the same message.
> >
>
> Hi,
>
> I have bisected the bad commit, it is r357002.
>
> --
> WBR, Andrey V. Elsukov
>