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

📦
version 5.6 · 9 versions
, in centos-stream 10, centos-stream 9, fedora 43, fedora 44

✨ PROBE::NFS.AOP.WRITEPAGE ✨

okay so this is a page from the Network File Storage Tapsets section of the SystemTap Tapset Reference — the manual is PROBE::NFS.AOP.W(3stap), section 3stap, and bestie, it's literally about watching your NFS client yeet a mapped page over to the NFS server. 💅

🌸 NAME 🌸

probe::nfs.aop.writepage — NFS client writing a mapped page to the NFS server. that's the whole vibe. 🦋

✨ SYNOPSIS ✨

probe nfs.aop.writepage {}

no args, no drama, just the probe. 🎀

👑 VALUES 👑

bestie these are the little goodies you get to peek at inside the probe. every single one, no skips:

  • i_size — the file length, in bytes. 📏
  • ino — the inode number. it's giving who is this file energy. 🔍
  • sb_flag — the super block flags. ⚑
  • for_kupdate — a flag of writeback_control, and it tells you if this is a kupdate writeback. 🧚
  • for_reclaim — also a flag of writeback_control, this one tells you if it got invoked from the page allocator. ♻️
  • size — how many pages are getting written in this execution. 📚
  • page_index — offset within the mapping; you can use it as a page identifier and as a position identifier in the page frame. double duty, iconic. 🫶
  • i_flag — the file flags. 🚩
  • __page — the address of the page. 📍
  • i_state — the inode state flags. 🌈
  • dev — the device identifier. 💾
  • wsize — the write size. ✍️

💖 DESCRIPTION 💖

The priority of wb is decided by the flags for_reclaim and for_kupdate. that's the tea, that's the whole mechanic. 🍓

🔥 SEE ALSO 🔥

and that's the page, bestie!! this was the SystemTap Tapset Reference, version, dated September 2026 — so if you're reading this from the future, hiii, hope the NFS writeback is treating you gently. 💜✨ periodt. 🎀🦋💅

📦 where this page comes from