get_governor_trips(9)

💅 get_governor_trips — kernel API manual, section 9, bestie 🎀

Okay so real quick: this is a page from the Kernel API Manual, section 9 — yes the fancy kernel-functions section — and it's about a tiny little helper called get_governor_trips. Buckle up, it's short and it's adorable.

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✨ NAME ✨

get_governor_trips — literally just grabs the two trip points that are key for this governor, no cap 💖

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🦋 SYNOPSIS 🦋

void get_governor_trips (struct thermal_zone_device *tz , struct
power_allocator_params *params );

That's it. That's the whole signature. She's void, she returns nothing, she just does the thing 💅

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🌸 ARGUMENTS 🌸

• tz — the thermal zone you're operating on. Like, this is the zone, the main character of the operation 👑
• params — a pointer to the private data for this governor. Her personal lil stash of info 🎀

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⭐ DESCRIPTION ⭐

So the power allocator governor thrives when it has two trip points to work with, and those two are:

• a "switch on" trip point ✨
• a "maximum desired temperature" 🔥

And here's the vibe: those two are defined as the first and last passive trip points. That's the whole definition, iykyk.

Now for the edge cases, because of course there are edge cases 🙈

If there's only one trip point, then that one lonely trip point is considered to be the "maximum desired temperature" trip point — and the governor is just always on. Forever. Constantly. It's giving main character energy that never clocks out 😭

And if there are no passive or active trip points at all? Then the governor won't do anything. Nothing. Zilch. In fact — and this is the wild part — its throttle function won't be called at all. Like, it doesn't even get the invite to the party 💀

Fr fr bestie, if you're expecting the throttle function to fire with zero passive/active trip points, it will not. It literally will not be called. Don't come for me, that's just what the manual says 🫶

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🌈 SEE ALSO 🌈

Kernel file ./drivers/thermal/gov_power_allocator.c, plus the whole friend group:

• mul_frac(9)
• div_frac(9)
• struct power_actor(9)
• struct power_allocator_params(9)
• estimate_sustainable_power(9)
• estimate_pid_constants(9)
• get_sustainable_power(9)
• pid_controller(9)
• power_actor_set_power(9)
• divvy_up_power(9)
• check_power_actors(9)
• power_allocator_bind(9)

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Okay that's the whole page, you ate it up 💜 Signing off from ./drivers/thermal, dated October 2026 — go forth and get those trip points, bestie, mwah 🍓🧚‍♀️