[Bug 219332] New: /sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference: Device or resource busy

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219332

            Bug ID: 219332
           Summary: /sys/devices/system/cpu/cpufreq/policy0/energy_perform
                    ance_preference: Device or resource busy
           Product: Power Management
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: high
          Priority: P3
         Component: cpufreq
          Assignee: linux-pm@vger.kernel.org
          Reporter: aros@gmx.com
        Regression: No

Created attachment 306935
  --> https://bugzilla.kernel.org/attachment.cgi?id=306935&action=edit
A dump of /sys/devices/system/cpu

I've played with various tee: /sys/devices/system/cpu/cpufreq/policy0/* options
and now on Linux 6.11 and Ryzen 7 5800X I'm getting this:

perfbias.sh power
Now: performance
Switching to: power
tee: /sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy10/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy11/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy12/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy13/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy14/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy15/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy1/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy2/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy3/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy4/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy5/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy6/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy7/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy8/energy_performance_preference:
Device or resource busy
tee: /sys/devices/system/cpu/cpufreq/policy9/energy_performance_preference:
Device or resource busy
Result: performance

This doesn't seem right.

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