Messages in this thread | | | Date | Mon, 13 May 2013 09:43:18 -0700 | From | Dirk Brandewie <> | Subject | Re: 3.9.0 + CONFIG_X86_INTEL_PSTATE=y -> ThinkPad T420 with i5 lost ACPI functionality |
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On 05/03/2013 12:36 PM, Rafael J. Wysocki wrote: > On Friday, May 03, 2013 06:55:37 PM Toralf Förster wrote: >> The following file doesn't exists at my Gentoo Linux >> /sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load >> in 3.9.0 if I activate CONFIG_X86_INTEL_PSTATE=y >> >> That means, that a command like >> >> $> echo 1 > /sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load >> >> in /etc/rc.local is now no longer working. >> A high fan + high temperature are the result, even if just the BOINC client >> is run with low prio (nice 19) in the back ground. >> >> Manually loading the missing module won't work too : >> >> $> modprobe acpi_cpufreq >> modprobe: ERROR: could not insert 'acpi_cpufreq': Device or resource busy >> >> Is the behaviour a bug or a feature ? > > The thermal management problem is not an intentional outcome, definitely. > >> In the later case: How can I achieve the previous behaviour back ? >>
I spent some more time looking for a solution to this you can get same behavior by setting a config option in BOINC "Use at most X % CPU time" see: http://boinc.berkeley.edu/wiki/Local_preferences
>> This issue might affect the RH EL kernel too [1] where I observed a similar behaviour. >> >> >> [1] http://elrepo.org/bugs/view.php?id=379 > > Dirk, is this the problem we were talking about recently or something else? > > Rafael > >
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