Re: [PATCH v4] cpupower: Implement powercap enabled setters

[Shuah Khan]

On 5/28/26 09:32, Mateusz Jaśkiewicz wrote:
> powercap_set_enabled() and powercap_zone_set_enabled() are part of the
> public libcpupower API, but both currently return success without
> updating sysfs.

You are right that cpupower set_enable API simply returns success.

Does intel-rapl:0 implement store function on your system?
It doesn't on mine.

cd /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0
echo 1 > enabled
bash: echo: write error: Function not implemented

> Write the requested value to the matching enabled attribute so callers
> can actually enable or disable the powercap control type or zone, and
> report write failures back to the caller.

The patch loos good. Is there an existing use-case for this?

thanks,
-- Shuah