linux-kernel - Re: Auto reboot when CPU at full load with X86_ACPI

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Date:	Mon, 12 Nov 2012 10:41:11 +0800
From:	Drunkard Zhang <gongfan193@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, cpufreq@...r.kernel.org,
	linux-pm@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Auto reboot when CPU at full load with X86_ACPI_CPUFREQ

2012/11/12 Pavel Machek <pavel@....cz>:
> Hi!
>
>> I'm using Intel Xeon X5570 x2 with Asus Z8PE-D18, and experiencing
>> auto reboot when CPU full loaded for minutes, like building kernel
>> with "make -j17". After a lot of bisecting of config file, I found the
>> option leads to the reboot: X86_ACPI_CPUFREQ, both configed
>> X86_ACPI_CPUFREQ as a module or built in will lead to reboot.
>>
>> Config file finally bisected appended, config-3.7.0-rc3+-bad is the
>> one leads to reboot, config-3.7.0-rc3+-ok works OK. Hardware info also
>> appended.
>>
>> I think it is a bug, anything I can do? When the bug triggered, the
>> screen blanked immediately, any advice for me to debug? Happy to match
>> to code :-)
>>
>> This bug is CPU specific, with Xeon E5606 or E5620 it's all fine, just
>> triggered with Xeon X5570, or maybe all Xeon X serial.
>>
>> Tested kernel version: 3.1.x, 3.3.x, 3.5.x, 3.6.x, 3.7*, they are all affected.
>
> What does temperature do during those runs?
>                                                                 Pavel

CPU temperature didn't over 60 by degrees. I'm sure it's not hardware
faults, because without X86_ACPI_CPUFREQ it works fine, built in or
load as module it will reboot. I also configured some debug options to
catch something, but the reboot is too fast, dam. Any sugests?
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