Re: hwpstate_intel hangs kernel

From: Andreas Nilsson <andrnils_at_gmail.com>
Date: Wed, 5 Feb 2020 14:45:50 +0100
Hello,

I upgraded to a newer version,  git 87d669d3863-c266265, and I do not
experience the random hang anymore. The machine still hangs on boot on
"hwpstate_intel0: <Intel Speed Shift> on cpu0" unless I set
'hint.hwpstate_intel.0.disabled="1"' in loader.conf.

On a side note I cannot set or unset that hint from loader prompt;

ok> set hint.hwpstate_intel.0.disabled="0"
ok> show
....
hint.hwpstate=
...

Best regards
Andreas

On Sat, Feb 1, 2020 at 11:26 PM Andreas Nilsson <andrnils_at_gmail.com> wrote:

> Hello Conrad,
>
> thank you Andrey for bisecting! I'll try with that hint and see how it
> works for me.
>
> Best regards
> Andreas
>
> On Sat, Feb 1, 2020, 18:18 Conrad Meyer <cem_at_freebsd.org> wrote:
>
>> 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
>> >
>>
>
Received on Wed Feb 05 2020 - 12:53:12 UTC

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