PROBE::IOSCHEDULER.ELV_NEXT_REQUEST.RETURN(3stap)

💖 PROBE::IOSCHEDULER.ELV_NEXT_REQUEST.RETURN 💖

okay bestie, welcome to 3stap — the SystemTap tapset manual, but make it cute. this page is all about one lil probe point and the tea it spills when it fires. no cap. 🫶

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✨ NAME ✨

probe::ioscheduler.elv_next_request.return — fires when a request retrieval issues a return signal 🌸

like, literally the moment the elevator scheduler's next_request call comes back, this probe wakes up and is like "hey girl, here's what happened." 💅

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🦋 SYNOPSIS 🦋

probe ioscheduler.elv_next_request.return {}

that's it. that's the whole vibe. a probe point with an empty body — you fill in the body with whatever you wanna do when it fires. main character energy honestly. ✨

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🎀 VALUES 🎀

these are the read-only goodies you get handed inside the probe handler. the way that every single one of them is just sitting there waiting for you?? obsessed. 💖

• disk_major — the disk major number of the request 👑
• disk_minor — the disk minor number of the request 🧚
• name — the name of the probe point 🌈
• rq — the address of the request 📍
• rq_flags — the request flags 🚩

ngl, grab these inside your probe handler and you've got the whole picture of what request just came back. iconic.

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👀 SEE ALSO 👀

• tapset::ioscheduler(3stap) — go read the parent tapset page, it's the whole friend group 🫶

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that's the page, bestie!! slay, you read the whole thing. 🎀✨

SystemTap Tapset Reference, Version, September 2026 — mwah, catch you on the next manpage 💅💖