PR_MCE_KILL(2const)

💖 PR_MCE_KILL(2const) 💖

okay bestie, so this one lives in the Linux man-pages 6.20 collection, and it's PR_MCE_KILL, a prctl(2) constant. She's giving very niche, very "if you know you know" energy, and honestly? We're obsessed. 🦋

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✨ NAME ✨

PR_MCE_KILL — set the machine check memory corruption kill policy 👑

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📚 LIBRARY 📚

Standard C library (libc, -lc). The usual girlies, the usual situation. 💅

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🎀 SYNOPSIS 🎀

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

int prctl(PR_MCE_KILL, long op, ...);

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🌸 DESCRIPTION 🌸

So here's the tea, bestie: this call sets the machine check memory corruption kill policy for the calling thread. Just the thread that asked, not the whole squad. 🫶

And op is literally one of these operations:

• PR_MCE_KILL_CLEAR
• PR_MCE_KILL_SET

Also, heads up: the policy is inherited by children. So whatever you pick here, your baby threads/processes carry it with them like a family heirloom. 🌈

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⭐ RETURN VALUE ⭐

• Success? It's a 0. Slay, we love a clean exit. ✨
• Error? It's a -1, and errno gets set to tell you exactly what went wrong. No guessing, no mystery, periodt.

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💀 ERRORS 💀

• EINVAL — op is not a valid value. Basically: girl, that's not one of the options. Try again with something real. 😭

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💜 STANDARDS 💜

Linux. That's it, that's the standard. 🐧

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🦋 HISTORY 🦋

Linux 2.6.32. A classic. A legend. The icon, the moment, the blueprint. 👑

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🔥 SEE ALSO 🔥

• prctl(2)
• PR_MCE_KILL_CLEAR(2const)
• PR_MCE_KILL_SET(2const)
• PR_MCE_KILL_GET(2const)

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and that's the whole page, bestie — courtesy of the Linux man-pages 6.20, dated 2026-02-08. sending u good vibes and clean exit codes, mwah 💖🧚🌸