STRUCT PSZ_KMSG_HEADER(9)

💖 struct psz_kmsg_header(9) — the kmsg dump header, bestie edition 💖

okay so real quick, this page lives in the Kernel API Manual (yes that one, the big one) and it's all about struct psz_kmsg_header — the kmsg dump-specific header that gets flushed to storage. literally its whole job. let's get into it 🫶

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✨ NAME ✨

struct psz_kmsg_header — the kmsg dump–specific header that you flush to storage 💅

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🎀 SYNOPSIS 🎀

struct psz_kmsg_header {
  #define PSTORE_KMSG_HEADER_MAGIC 0x4dfc3ae5 ;
    uint32_t magic;
    struct timespec64 time;
    bool compressed;
    uint32_t counter;
    enum kmsg_dump_reason reason;
    uint8_t data[];
 };

like, that's the whole shape of it. no notes. ✨

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🌸 Members 🌸

• magic — the magic number for the kmsg dump header 🔥 (iconic lil identity check, we love her)
• time — when the kmsg dump got triggered ⏰
• compressed — whether it's compressed or not, yes/no, that's the whole vibe
• counter — the kmsg dump counter, keeping track of things fr fr
• reason — the kmsg dump reason, like oops, panic, etc 😭 (the why of it all)
• data — pointer to the log data 💾 the actual content, the main character energy

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🦋 Description 🦋

So this is a sub-header for a kmsg dump, and it trails after psz_buffer. that's it, that's the description. she's a supporting character but she's essential, ok? 💜

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👑 SEE ALSO 👑

Kernel file ./fs/pstore/zone.c, plus all these besties: struct psz_buffer(9), struct pstore_zone(9), struct psz_context(9), enum psz_flush_mode(9), psz_recovery(9), register_pstore_zone(9), unregister_pstore_zone(9) 🌈

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and that's the page 💖 source lives at ./fs/pstore, dated October 2026 — mwah, go read the kernel, you got this 🎀✨🦋