STRUCT KHO_KEXEC_METADATA(9)

🦋 struct kho_kexec_metadata(9) — from the Kernel API Manual, bestie 💅

okay so picture this: a little struct that literally survives a whole kernel reboot. it's giving main character energy and honestly? iconic. this is the struct kho_kexec_metadata page, and yes we're gonna get into all of it ✨

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🌸 NAME 🌸

struct kho_kexec_metadata — the kexec metadata that gets passed between kernels, no cap 🫶

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⭐ SYNOPSIS ⭐

struct kho_kexec_metadata {
    u32 version;
    char previous_release[__NEW_UTS_LEN + 1];
    u32 kexec_count;
 };

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🎀 Members 🎀

• version — the ABI version of this struct, and heads up bestie, it must be the first field. like, non-negotiable, it has to go first 💀
• previous_release — the kernel version string of whichever kernel initiated the kexec 🌈
• kexec_count — how many kexec boots have happened since the last cold boot, fr fr 🔥

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💖 Description 💖

so this structure is preserved across kexec, which is the whole point — it lets the new kernel figure out two things: which kernel it was booted from, and how many kexec reboots have gone down already 👑

and about __NEW_UTS_LEN — it's part of uABI, so using it in here is safe. slay 🧚

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🔮 SEE ALSO 🔮

• Kernel file ./include/linux/kho/abi/kexec_metadata.h
• Kexec Metadata ABI(9)

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k that's the whole vibe, ily, go read the source at ./include/linux/kho/abi 💜✨ — this cutie was dated October 2026, and it's struct kho_kexec_metadata(9), periodt 🎀