nvme_set_fe...esv_persist2(2)

💖 nvme_set_features_resv_persist2 — bestie edition 💖

okay so you're in the libnvme API manual, and today we're learning nvme_set_features_resv_persist2, which is genuinely one of those names that looks like someone fell asleep on the keyboard, but trust, it's just "set the persist-through-power-loss feature" and it's not that deep. 🫶

This is a <cyan>2</cyan>-section page (a syscall-ish C function, iykyk), and yes, the title up top got squished to nvme_set_fe...esv_persist2(2) because even the manpage formatter is a little dramatic. Not me defending it. 😭

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✨ NAME ✨

nvme_set_features_resv_persist2 — Set persist through power loss feature 💅

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🌸 SYNOPSIS 🌸

int nvme_set_features_resv_persist2 (int fd , __u32 nsid , bool ptpl ,
       bool save , __u32 *result );

like... look at her. six things. that's it. we can do this. 🌈

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🦋 ARGUMENTS 🦋

• fd — the file descriptor of the nvme device. your little handle on the drive, your golden ticket, your main character entrance. 🎀
• nsid — the namespace ID. which namespace are we talking to, bestie? be specific. 💫
• ptpl — Persist Through Power Loss. the whole point of the function, the moment, the icon. 🔥
• save — save value across power states. do you want this to survive the lights going out? yes ma'am. 💾✨
• result — the command completion result from CQE dword0. that's where the answer comes back to you, dword0 specifically, no cap. 📬

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💜 RETURN 💜

So here's the vibe check: you get the nvme command status if a response was received, and for the full list of what those statuses even mean you go look at enum nvme_status_field. Otherwise? It's -1 and errno gets set. 💀

Lowkey important: -1 with errno set means no response came back at all — don't go reading result like it's gospel in that case, because bestie, nothing came home. 🚫

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that's the whole page, fr fr — no extra options hiding in the back, no secret flags, just vibes, a pointer, and a couple of bools. obsessed. 🧚

mwah 💋 — this one's from the libnvme API manual, dated July 2026, and it signs off with nvme_set_fe...esv_persist2(2) because the short name is just how she likes to be introduced. periodt. 👑💖✨