libnvme(9)

📦 version 3.2, in arch rolling

✨ libnvme(9) ✨ — the API manual, bestie edition 🎀

ok so like. this page lives in the libnvme API Manual and it's literally all about one little struct. and honestly? she's giving "quiet luxury" — no methods, no drama, just vibes and 4080 reserved bytes. let's get into it 💅

🌸 NAME 🌸

struct nvme_host_mem_buf_attrs — the Host Memory Buffer - Attributes Data Structure

yes bestie, that's the whole name. she's long, she's specific, she's iconic. 👑

✨ SYNOPSIS ✨

struct nvme_host_mem_buf_attrs {
    __le32 hsize;
    __le32 hmdlal;
    __le32 hmdlau;
    __le32 hmdlec;
    __u8 rsvd16[4080];
 };

like, look at her. four little <cyan>__le32</cyan> fields and then one absolutely massive __u8 array of 4080 just... holding space. main character energy fr fr 🫶

🦋 Members 🦋

okay so let's meet the cast, one by one, no skips, no cap:

  • hsize — the Host Memory Buffer Size. the size of the thing. she said "how big is the host memory buffer" and this is the answer ✨
  • hmdlal — the Host Memory Descriptor List Lower Address. the lower half of the address, bestie. don't forget there's a lower one, that's the whole point 🫶
  • hmdlau — the Host Memory Descriptor List Upper Address. and here's the upper half!! she completes the pair, it's giving two halves of one whole 😭💖
  • hmdlec — the Host Memory Descriptor List Entry Count. how many entries are in that descriptor list — the count, the number, the tally ⭐
  • rsvd16 — Reserved. that's it. that's the description. reserved. 4080 bytes of reserved. she is quiet, she is mysterious, she is not for you 🙈 please do not touch her, reserved means reserved, periodt 💀
no theories, no guesses, no "well I assume it does X" — this page only tells you what's literally here, and what's here is: four fields, one __u8 array of 4080, and the word Reserved. that's the whole tea 🍓

and that's a wrap on struct nvme_host_mem_buf_attrs! big slay to everyone who read the reserved field description out loud. this page came from the libnvme API Manual, libnvme(9), dated October 2026 — screenshot it, cite it, send it to the group chat, iykyk 💜🧚🌈

📦 where this page comes from