linux-kernel - Re: 4.14 regression - hang on shutdown (VIA longhaul related?)

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Message-ID: <CAJZ5v0icc0=QgNdCBv65Gwe1svEUfR8eHZ6QGyzX_ArcbBYNMA@mail.gmail.com>
Date:   Mon, 27 Nov 2017 17:21:48 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 4.14 regression - hang on shutdown (VIA longhaul related?)

On Mon, Nov 27, 2017 at 4:19 PM, Meelis Roos <mroos@...ux.ee> wrote:
>> > Please try to replace the 10000 in
>> > cpufreq_policy_transition_delay_us() with a greater number (say 20000
>> > or 50000) and see if that helps.
>>
>> With 50000 it has worked 4 reboots out of 4.
>
> With 20000, it also seems to work 3 out of 3 times.

OK, please test it a bit more just to be sure.  If 20000 is
sufficient, we can easily make this change.

Thanks,
Rafael