freeze_kernel_threads(9)

✨ freeze_kernel_threads — a.k.a. "go to the refrigerator" ✨

Ok so bestie, welcome to the freeze_kernel_threads(9) page from the Kernel API Manual 💅 this one's short and sweet, but it's lowkey important so like… pay attention 🫶

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🎀 NAME 🎀

freeze_kernel_threads — literally just making freezable kernel threads go to the refrigerator 🧊✨

Like yes, that's the whole vibe. The kernel threads get sent to chill. No cap.

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🌸 SYNOPSIS 🌸

int freeze_kernel_threads (void );

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🦋 ARGUMENTS 🦋

• void — no arguments, bestie. None. Zero. Not a single one 🙈 it just takes nothing and does its thing.

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💖 DESCRIPTION 💖

Okay so here's the tea ☕ on success it returns 0 — iconic, we love a clean return 💅

But on failure? It returns -errno, and ⚠️ only the kernel threads are thawed — not the userspace tasks. Ngl this is on purpose: it gives the caller a chance to do any additional cleanups (if any) before thawing the userspace tasks. So basically the kernel threads come out of the fridge first and everyone else is still chilling 🧊

So, heads up: it is the responsibility of the caller to thaw the userspace tasks, when the time is right 👑 like the caller is the main character here and has to handle that part. Periodt.

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👑 SEE ALSO 👑

• Kernel file ./kernel/power/process.c 📁
• freeze_processes(9) 🔥

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That's literally the whole page, bestie 💜 short king of a manpage fr fr. Go thaw those userspace tasks when the time is right, ok? 🫶

This little gem lives in ./kernel/power 🌈 dated October 2026 🎀 — mwah, bye! 💋✨