linux-kernel - Re: Crashes in arm qemu emulations due to 'cpufreq: governor: Replace timers with utilization ...'

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Message-ID: <CAJZ5v0hqVCXE0kDfr_4zLz_-c-4KJo8bJg8xVVc1Qd66eA+iHQ@mail.gmail.com>
Date:	Mon, 15 Feb 2016 21:38:25 +0100
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Tony Lindgren <tony@...mide.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-next@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Crashes in arm qemu emulations due to 'cpufreq: governor: Replace
 timers with utilization ...'

On Mon, Feb 15, 2016 at 9:09 PM, Guenter Roeck <linux@...ck-us.net> wrote:
> On 02/15/2016 11:58 AM, Tony Lindgren wrote:
>>
>> * Guenter Roeck <linux@...ck-us.net> [160215 11:41]:
>>>
>>> On 02/15/2016 11:01 AM, Tony Lindgren wrote:
>>>>
>>>>
>>>> https://kernelci.org/boot/all/job/next/kernel/next-20160215/
>>>>
>>>> The SMP ones seem to fail with some regulator issues?
>>>>
>>>
>>> There is another problem, introduced with 6a0712f6f199e ("PM / OPP: Add
>>> dev_pm_opp_set_rate()"). The kernelci boot log for
>>> next-20160212:omap3-overo-tobi
>>> and others experience that problem.
>>>
>>> Essentially, the code now assumes that a CPU clock always has a voltage
>>> regulator attached to it, which is not correct. I sent out a patch to fix
>>> that problem a minute ago.
>>
>>
>> Yes that fixed it thanks.
>>
>
> Confirmed. With this patch plus mine, all arm qemu tests are again passing
> for me.

OK, I'll add it to the governor changes branch.

Thanks,
Rafael