suspend_prepare(9)

💤 suspend_prepare(9) — like, the Kernel API Manual, bestie 💤

okay so we're in the <pink>Kernel API Manual</pink> today and the star of the show is suspend_prepare(9) — yes that's the actual man page name, we're being formal 💅

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✨ NAME ✨

suspend_prepare — the lil pre-game ritual before your system goes night-night 😴

🦋 SYNOPSIS 🦋

int suspend_prepare (suspend_state_t state );

🎀 ARGUMENTS 🎀

• state — the target system sleep state, aka which flavour of snooze we're aiming for 🌸

💖 DESCRIPTION 💖

so this is the common code that runs for every system sleep state that can actually be entered — with one very important exception, <red>except for hibernation</red> (not invited to this party, no cap) 🙈

what does it actually do? three things, bestie, and it ate:

• it runs the suspend notifiers 🔔
• it allocates the "suspend" console 🖥️
• and it freezes processes 🧊 (yes, literally, the way they just stop — iconic)

👑 SEE ALSO 👑

• the kernel file itself: ./kernel/power/suspend.c — go read the source, iykyk 📖
• pm_suspend_default_s2idle(9)
• suspend_set_ops(9)
• suspend_valid_only_mem(9)
• suspend_enter(9)
• suspend_devices_and_enter(9)
• suspend_finish(9)
• enter_state(9)
• pm_suspend(9)

like, the whole friend group fr fr 🫶

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quick vibe check: everything above is straight from the page — the state arg, the notifiers, the "suspend" console, the process freezing, and that hibernation carve-out all stay exactly as written. no invented facts, periodt. 💜

and that's the page!! mwah 💋 — signed off from ./kernel/power, dated <cyan>October 2026, filed under suspend_prepare(9) ⭐🍓✨