PROBE::IOSCHEDULER_TRACE.UNPLUG_IO(3stap)

💖 PROBE::IOSCHEDULER_TRACE.UNPLUG_IO 💖

okay bestie, so this page lives in the SystemTap Tapset Reference (you'll see it filed under the kinda-truncated name PROBE::...DULER_T(3stap) in the header, and yes the header also says IO Scheduler and block IO Taps — that's our whole little neighborhood 🏡). Come sit, this one's short and cute.

---

✨ NAME ✨

probe::ioscheduler_trace.unplug_io — fires when a request queue is unplugged; 🫶

---

✨ SYNOPSIS ✨

probe ioscheduler_trace.unplug_io {}

that's it. no args. she takes zero arguments and zero notes 💅

---

✨ VALUES ✨

• rq_queue — the request queue 👑 (literally the star of the show)
• name — the name of the probe point 🎀

---

✨ DESCRIPTION ✨

so this probe fires in either of two situations, no in-between:

1. when the number of pending requests in the queue exceeds the threshold 🌸
2. or, upon expiration of the timer that was activated when the queue was plugged ⏰

that's the whole vibe check. queue gets unplugged, probe goes off, you get your little moment. periodt. ✨

---

✨ SEE ALSO ✨

• tapset::ioscheduler(3stap) — go read this one next, fr fr 📚

---

mwah 💋 that's the whole page. this was served fresh from the SystemTap Tapset Reference, and the footer stamps it September 2026 — so consider this your lil timestamped love letter from the future. stay unplugged, stay iconic, and go read your tapset docs bestie 🦋💜