STRUCT BLK_MQ_CTX(9)

💅 struct blk_mq_ctx(9) 💅

okay so this is from the Kernel API Manual, bestie — deep lore from the block layer, and you're gonna get it, i promise 🫶

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✨ NAME ✨

struct blk_mq_ctx — the state for a software queue that faces the submitting CPUs 💫

like, that's literally its whole job description. software queue. facing the CPUs that submit. state. that's the vibe 🎀

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🦋 SYNOPSIS 🦋

here's the whole shape of it, character for character, no cap:

struct blk_mq_ctx {
    struct {
      spinlock_t lock;
      struct list_head        rq_lists[HCTX_MAX_TYPES];
    };
    unsigned int            cpu;
    unsigned short          index_hw[HCTX_MAX_TYPES];
    struct blk_mq_hw_ctx    *hctxs[HCTX_MAX_TYPES];
    struct request_queue    *queue;
    struct blk_mq_ctxs      *ctxs;
    struct kobject          kobj;
 };

look at that anonymous little nested struct just vibing at the top with its lock and its rq_lists[HCTX_MAX_TYPES] — main character energy fr fr 🌸

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🎀 Members 🎀

• {unnamed_struct} — anonymous 🙈 that's it, that's the entry. it's anonymous, it has no name, it simply is. iconic.

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🔥 SEE ALSO 🔥

• the kernel file ./block/blk-mq.h — go read it, iykyk 👑

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ngl bestie, everything you need is right here in this struct — don't go inventing extra fields, the source of truth is the source 🧚

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that's the whole page!! 🍓 and for the receipts: it comes to you from ./block, dated October 2026, and the page is struct blk_mq_ctx(9). slay, go touch some block layer ✨💜