libnvme(9)

💅 libnvme(9) — enum nvme_pmrebs 🎀

okay so bestie, welcome to libnvme(9), the API manual ✨ — and today's main character is a lil enum called enum nvme_pmrebs, which is literally all about the persistent memory region elasticity buffer size. yes that's a mouthful, no i will not be shortening it, we respect the acronyms in this house 🫶

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🌸 NAME 🌸

enum nvme_pmrebs — This field indicates the persistent memory region elasticity buffer size 💖

like… that's the whole vibe. it's a field, it holds the size, it's elastic (buffer-wise), it's persistent memory region energy, periodt.

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✨ SYNOPSIS ✨

so here's the whole squad, assembled:

enum nvme_pmrebs {
    NVME_PMREBS_PMRSZU_SHIFT ,
    NVME_PMREBS_RBB_SHIFT ,
    NVME_PMREBS_PMRWBZ_SHIFT ,
    NVME_PMREBS_PMRSZU_MASK ,
    NVME_PMREBS_RBB_MASK ,
    NVME_PMREBS_PMRWBZ_MASK ,
    NVME_PMREBS_PMRSZU_B ,
    NVME_PMREBS_PMRSZU_1K ,
    NVME_PMREBS_PMRSZU_1M ,
    NVME_PMREBS_PMRSZU_1G

};

that's ten constants. ten. count them. i did. twice. 🔥

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🦋 Constants 🦋

okay so every single one of these gets its own moment, no one gets left out, i don't play favorites (i do, but not here):

• NVME_PMREBS_PMRSZU_SHIFT — the shift amount you use to get the PMR elasticity buffer size units ✨
• NVME_PMREBS_RBB_SHIFT — the shift amount to get the read bypass behavior 👀
• NVME_PMREBS_PMRWBZ_SHIFT — the shift amount to get the PMR elasticity buffer size base 💫
• NVME_PMREBS_PMRSZU_MASK — the mask to get the PMR elasticity buffer size units 🎀
• NVME_PMREBS_RBB_MASK — the mask to get the read bypass behavior 🫶
• NVME_PMREBS_PMRWBZ_MASK — the mask to get the PMR elasticity buffer size base 🧚
• NVME_PMREBS_PMRSZU_B — Bytes 🍓
• NVME_PMREBS_PMRSZU_1K — 1 KiB ⭐
• NVME_PMREBS_PMRSZU_1M — 1 MiB 💜
• NVME_PMREBS_PMRSZU_1G — 1 GiB 👑

so the three _SHIFT constants shift, the three _MASK constants mask, and the four PMRSZU size constants are literally just your units: bytes, 1 KiB, 1 MiB, 1 GiB. the way that progression ate, honestly 🌈

ngl bestie, notice how _SHIFT and _MASK come in matching trios (PMRSZU, RBB, PMRWBZ) — that symmetry is highkey iconic, iykyk 💅

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and that's the whole page, no cap 💀 thank you for coming to my ted talk, this was enum nvme_pmrebs in libnvme(9), dated October 2026 🎀💖✨ mwah, go read the rest of the API manual, ily 🫶