STRUCT RANK_INFO(9)

💅 struct rank_info(9) 💅

okay bestie, welcome to the Kernel API Manual — yes we're reading kernel docs together, this is our bonding era. today's main character is struct rank_info, no cap.

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✨ NAME ✨

struct rank_info — literally holds the info for one DIMM rank. one. singular. she's not doing multiples, that's not her job 🎀

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🦋 SYNOPSIS 🦋

struct rank_info {
    int chan_idx;
    struct csrow_info *csrow;
    struct dimm_info *dimm;
    u32 ce_count;
 };

look at her. four fields. small but mighty 💖

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🌸 Members 🌸

• chan_idx — the channel number where this rank lives (typically 0 or 1, iykyk). it's an int, she's flexible like that.
• csrow — a pointer to the chip select row structure, aka the parent structure 👑. you find where the rank actually is using the vector (csrow->csrow_idx, chan_idx) — write that down, it's giving coordinates.
• dimm — a pointer to the struct dimm_info, which is where the DIMM label information is stored 🏷️. that's where the name tag lives.
• ce_count — number of correctable errors for this rank. it's a u32. count 'em, bestie 🔥

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🧚 Description 🧚

FIXME: currently, the EDAC core model will assume one DIMM per rank. this is a bad assumption, but it makes this patch easier 😭. later patches in this series will fix this issue — so she's a work in progress, we love her anyway 🫶

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⭐ SEE ALSO ⭐

kernel file ./include/linux/edac.h — plus the whole friend group, go say hi:

• enum dev_type(9)
• enum hw_event_mc_err_type(9)
• enum mem_type(9)
• enum edac_type(9)
• enum scrub_type(9)
• enum edac_mc_layer_type(9)
• struct edac_mc_layer(9)
• struct edac_raw_error_desc(9)
• edac_get_dimm(9)
• struct edac_scrub_ops(9)
• struct edac_ecs_ops(9)
• struct edac_mem_repair_ops(9)

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🌈 and that's the whole vibe check! this page comes to you from ./include/linux, dated October 2026 — iconic source, iconic date, periodt 💜