STRUCT PERSISTENT_RAM_ZONE(9)

💾 struct persistent_ram_zone(9) — Kernel API Manual 🎀

🌸 NAME 🌸

okay so bestie, struct persistent_ram_zone is literally the details of a persistent RAM zone (PRZ) used as a pstore backend. that's the whole main-character job of this struct ✨

✨ SYNOPSIS ✨

here's the whole struct, exact and untouched, no cap:

struct persistent_ram_zone {
    phys_addr_t paddr;
    size_t size;
    void *vaddr;
    char *label;
    enum pstore_type_id type;
    u32 flags;
    raw_spinlock_t buffer_lock;
    struct persistent_ram_buffer *buffer;
    size_t buffer_size;
    char *par_buffer;
    char *par_header;
    struct rs_control *rs_decoder;
    int corrected_bytes;
    int bad_blocks;
    struct persistent_ram_ecc_info ecc_info;
    char *old_log;
    size_t old_log_size;
};

🧚 Members 🧚

tiny heads-up: vaddr is chillin' in the struct above, but this page's Members list doesn't give it its own description — so I'm not gonna invent one, bestie 🙈. the rest are right here:

• paddr — physical address of the mapped RAM area.
• size — size of the mapping.
• label — unique name of this PRZ.
• type — frontend type for this PRZ.
• flags — holds PRZ_FLAGS_* bits.
• buffer_lock — locks access to the buffer's size bytes and start offset.
• buffer — pointer to the actual RAM area managed by this PRZ.
• buffer_size — bytes in buffer->data (not including any trailing ECC bytes).
• par_buffer — pointer into buffer->data containing the ECC bytes for buffer->data.
• par_header — pointer into buffer->data containing the ECC bytes for the buffer header (i.e. all fields up to data).
• rs_decoder — RSLIB instance for doing ECC calculations.
• corrected_bytes — ECC corrected bytes accounting since boot.
• bad_blocks — ECC uncorrectable bytes accounting since boot.
• ecc_info — ECC configuration details.
• old_log — saved copy of buffer->data prior to the most recent wipe.
• old_log_size — bytes contained in old_log.

👀 SEE ALSO 👀

• Kernel file ./fs/pstore/ram_internal.h — that's the kernel file this page points you at, bestie 👑

mwah 💋 — this page came from ./fs/pstore, is dated October 2026, and answers to struct persistent_ram_zone(9) 💜