PROBE::NFS.AOP.R(3stap)

💖 PROBE::NFS.AOP.R 💖

okay bestie, welcome to the Network File Storage Tapsets section of the SystemTap Tapset Reference — this one's called probe::nfs.aop.readpage and it's giving very niche, very specific, very slay 🦋

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✨ NAME ✨

probe::nfs.aop.readpage — the NFS client is synchronously reading a page, no cap 📖

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🌸 SYNOPSIS 🌸

probe nfs.aop.readpage {}

that's it. that's the whole thing. she's simple, she's elegant, she's a vibe 💅

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🎀 VALUES 🎀

okay so when this probe fires, here's everything you get handed, and you're gonna want all of it:

• file — the file argument. yeah. that's the whole description. she said what she said 🙈
• ino — the inode number. the ID card of the file, fr fr 🪪
• i_size — file length in bytes 📏
• size — how many pages are getting read in this execution. like, this specific run, not forever ✨
• sb_flag — the super block flags 🚩 (not that kind of red flag, the filesystem kind)
• page_index — the offset within the mapping. you can use it as a page identifier AND a position identifier in the page frame. dual purpose icon behavior 👑
• i_flag — file flags 🏴
• dev — device identifier 🔌
• rsize — read size, in bytes 📦
• __page — the address of the page. the actual location. the main character's home address 🏠

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💜 DESCRIPTION 💜

so here's the tea: this probe reads the page over, and it only fires when a previous async read operation failed 😭

like — the async attempt didn't pull through, so now we're doing it the synchronous way. it's the backup plan probe. the "fine, I'll do it myself" energy. and honestly? iconic.

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🫶 SEE ALSO 🫶

• tapset::nfs(3stap) — go read the family, they're all so valid 💖

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and that's the whole page, bestie!! no notes, she ate and left no crumbs 🍓 this was SystemTap Tapset Reference, Ver, dated September 2026 — mwah, ily, go probe something slay 💅✨🦋