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132 points cl3misch | 1 comments | 17 Jun 24 22:44 UTC | HN request time: 0.001s | source

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M95D ◴[18 Jun 24 06:23 UTC] No.40714615[source]▶

So, why is this not in kernel?

replies(1): >>40719123 #

zamadatix ◴[18 Jun 24 15:41 UTC] No.40719123[source]▶

The ability to do this is exposed via the kernel (writing MSRs). The userspace app here just makes that friendly.

replies(1): >>40735945 #

1. M95D ◴[20 Jun 24 07:34 UTC] No.40735945[source]▶

I don't know how it works, but I thought MSR write was forbidden since... v5.10... ?

Anyway, I was expecting to see it in the "Voltage and Current Regulator Support" in kernel menuconfig.

Intel-undervolt: CPU undervolting and throttling configuration tool for Linux