PR_MCE_KILL_CLEAR(2const)

✨ PR_MCE_KILL_CLEAR ✨

okay so bestie, we're deep in the 2const girlies section of the manual — this one is PR_MCE_KILL_CLEAR, and it's a lil prctl constant that resets your machine check memory corruption kill policy. tiny page, big vibes, let's go 💅

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🌸 NAME 🌸

PR_MCE_KILL_CLEAR — clear the machine check memory corruption kill policy

📚 LIBRARY 📚

Standard C library (libc, -lc) — the classic, no cap.

🎀 SYNOPSIS 🎀

#include <linux/prctl.h>  /* Definition of PR_* constants */
#include <sys/prctl.h>

int prctl(PR_MCE_KILL, PR_MCE_KILL_CLEAR, 0L, 0L, 0L);

like. look at those three lil 0Ls just sitting there. icons. they mean nothing and everything 🫶

💖 DESCRIPTION 💖

Clear the thread memory corruption kill policy and use the system-wide default.

that's it. that's the whole thing. it's giving "factory reset but make it per-thread" ✨

🔥 RETURN VALUE 🔥

On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.

so like, if you get 0 you're slaying, and if you get -1 you gotta go read errno and find out what went wrong, sorry babe 😭

🦋 FILES 🦋

• /proc/sys/vm/memory_failure_early_kill — This file defines the system-wide default.

yep, that's the file holding the system-wide default that PR_MCE_KILL_CLEAR hands the reins back to 👑

⭐ STANDARDS ⭐

Linux.

just Linux. she's not POSIX, she doesn't wanna be, she's built different 💀

🌈 HISTORY 🌈

Linux 2.6.32.

ancient. vintage. still valid. the way that she's been here since 2.6.32 and never left — main character energy fr fr 🔥

👑 SEE ALSO 👑

• prctl(2)
• PR_MCE_KILL(2const)
• proc_sys_vm(5)

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and that's the whole page bestie!! go forth and clear those policies 💅✨

this was brought to you by Linux man-pages 6.20, dated 2026-02-08 — the PR_MCE_KILL_CLEAR(2const) page, signed off with love 🎀 no cap, she ate.