STRUCT DEVFREQ_SIMPLE_ONDEMAND_DATA(9)

✨ struct devfreq_simple_ondemand_data ✨

okay so we're deep in the Kernel API Manual bestie, like full kernel-mode group chat, and this page is all about struct devfreq_simple_ondemand_data — the little vibe-check struct whose void *data gets fed to struct devfreq and to devfreq_add_device. it's giving "tiny struct, big responsibility" ngl 💅

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🦋 SYNOPSIS 🦋

struct devfreq_simple_ondemand_data {
    unsigned int upthreshold;
    unsigned int downdifferential;
 };

look at her. two unsigned ints. no notes. iconic. ✨

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🌸 Members 🌸

• upthreshold — bestie this is THE threshold. if the load is over this value, the frequency jumps. that's it, that's the whole job, and she ate. specify 0 to use the default. valid value = 0 to 100. 🎀
• downdifferential — the cooldown queen. if the load is under upthreshold - downdifferential, the governor may consider slowing the frequency down. specify 0 to use the default. valid value = 0 to 100. and the rule, the one you canNOT break: downdifferential < upthreshold must hold. no cap, that's a hard requirement 💀

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🫶 Description 🫶

so like, if the devfreq_simple_ondemand_data pointer that gets fed to the governor is NULL? the governor just uses the default values. she's flexible like that 😌🌸

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👑 SEE ALSO 👑

go snoop the kernel file ./include/linux/devfreq.h for all the related lore:

• struct devfreq_dev_status(9)
• struct devfreq_dev_profile(9)
• struct devfreq_stats(9)
• struct devfreq(9)
• struct devfreq_passive_data(9)

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fr fr read those too, the whole devfreq friend group is linked, iykyk 🌈

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and that's the page bestie!! huge shoutout to ./include/linux (that's the source section, mwah) and to October 2026 for the version date — mwah mwah, love you, bye!! 💖🎀🦋💜