nfsd_file_lru_cb(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nfsd_file_lru_cb(9) — or, the kernel API manual's main character ✨

okay bestie, welcome to the Kernel API Manual entry for nfsd_file_lru_cb(9) — yes that's the whole name, yes it's a mouthful, we love her anyway 🫶

🌸 NAME 🌸

nfsd_file_lru_cb — Examine an entry on the LRU list 👀

⭐ SYNOPSIS ⭐

enum lru_status nfsd_file_lru_cb (struct list_head *item , struct
       struct list_lru_one *lru , void *arg );

no cap, that's the whole signature — she takes three things and returns an enum lru_status. iconic behavior honestly 💅

🎀 ARGUMENTS 🎀

  • item — the LRU entry we're examining, like the little guy under the microscope 🔍
  • lru — the LRU that's calling the shots, the controlling one 👑
  • arg — the dispose list, just vibing in the third slot 🍓

🦋 DESCRIPTION 🦋

so the whole point of this function is checking out one single entry on the LRU list. that's it, that's the gig ✨

and here's the return value tea, bestie — memorize these, they matter:

  • LRU_REMOVED — item was removed from the LRU, she's outta there 💀
  • LRU_ROTATE — item is to be moved to the LRU tail, off to the back of the line 🌈
  • LRU_SKIP — item cannot be evicted, hard pass, not today 🙈
fr fr, those three statuses are the entire contract — no extra lore, that's just what it says 💖

💜 SEE ALSO 💜

Kernel file ./fs/nfsd/filecache.c — go read the source, iykyk 📖

and the whole friend group of related pages, because she does not exist in a vacuum:

not me listing all twenty of them — every single one gets a shoutout, that's the rule 💅✨

and that's the page, bestie 🎀 this lil manual came from ./fs/nfsd and it's dated October 2026, so like… mark your calendar 👑. mwah, go read the source, slay, periodt 💖🦋🌸

📦 where this page comes from