https://bugzilla.kernel.org/show_bug.cgi?id=86461 Bug ID: 86461 Summary: intel_pstate does not obey min/max frequencies set by user Product: Power Management Version: 2.5 Kernel Version: 3.17-rc5 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: cpufreq Assignee: cpufreq@xxxxxxxxxxxxxxx Reporter: patrakov@xxxxxxxxx Regression: No # uname -a Linux aep-vaio 3.17.0-rc5 #1 SMP PREEMPT Thu Sep 18 23:13:08 YEKT 2014 x86_64 Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz GenuineIntel GNU/Linu # echo 2400000 | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq # cpufreq-info cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please. analyzing CPU 0: driver: intel_pstate CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 2.40 GHz and 3.50 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 804 MHz (asserted by call to hardware). analyzing CPU 1: driver: intel_pstate CPUs which run at the same hardware frequency: 1 CPUs which need to have their frequency coordinated by software: 1 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 2.40 GHz and 3.50 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 885 MHz (asserted by call to hardware). analyzing CPU 2: driver: intel_pstate CPUs which run at the same hardware frequency: 2 CPUs which need to have their frequency coordinated by software: 2 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 2.40 GHz and 3.50 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 800 MHz (asserted by call to hardware). analyzing CPU 3: driver: intel_pstate CPUs which run at the same hardware frequency: 3 CPUs which need to have their frequency coordinated by software: 3 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 2.40 GHz and 3.50 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 822 MHz (asserted by call to hardware). As you see, my attempt to force the minimum frequency to 2.4 GHz has been ignored. -- You are receiving this mail because: You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
