STRUCT DEVFREQ_DEV_STATUS(9)

💖 struct devfreq_dev_status(9) 💖

okay so bestie, welcome to the Kernel API Manual page for struct devfreq_dev_status(9) — this is the moment, this is the vibe, let's get into it ✨

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🌸 NAME 🌸

struct devfreq_dev_status — literally the data that gets handed from a devfreq user device over to the governors, and it represents the performance statistics. no cap, that's the whole personality 💅

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🦋 SYNOPSIS 🦋

struct devfreq_dev_status {
    unsigned long total_time;
    unsigned long busy_time;
    unsigned long current_frequency;
    void *private_data;
 };

look at her. four fields. absolutely iconic 🎀

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👑 Members 👑

• total_time — the total time that this instance of devfreq_dev_status represents. that's the whole window, the entire era, the full timestamp situation 🕰️
• busy_time — the slice of total_time where the device was actually working. like, out of all that time, this is how much of it was her being productive 💪
• current_frequency — the operating frequency. the speed she's running at rn 🔥
• private_data — an entry that the devfreq framework does not specify, okay? a device and a specific governor can have their own little protocol going on with private_data. but — and this is the important part, bestie — because this is governor-specific, a governor that uses this will only be compatible with devices that are aware of it. so it's giving exclusive club, invite only, iykyk 🙈

fr fr, read that private_data note again if you're writing a governor. compatibility is not automatic here and the kernel will not hold your hand 💀

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/devfreq.h
• struct devfreq_dev_profile(9)
• struct devfreq_stats(9)
• struct devfreq(9)
• struct devfreq_simple_ondemand_data(9)
• struct devfreq_passive_data(9)

the whole friend group, go say hi 🫶

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and that's the page! sourced from ./include/linux, dated October 2026 — mwah, go forth and govern responsibly, bestie 💜🧚⭐