cache_key_insert(9)

📦 version 7.3.1, in nixpkgs unstable

💖 cache_key_insert(9) — or, like, the kernel API manual but make it make sense 🎀

okay so first things first, the header said this is cache_key_insert(9) from the Kernel API Manual, and yes bestie, we're reading kernel docs together, this is our era now ✨

🌸 NAME 🌸

cache_key_insert — drops a brand-new cache key into the cache tree, no cap 💅

🦋 SYNOPSIS 🦋

void cache_key_insert (struct pcache_cache_tree *cache_tree , struct
       pcache_cache_key *key , bool fixup );

like, it returns void, so don't go looking for a return value, it's giving nothing and that's on purpose 🙈

🎀 ARGUMENTS 🎀

  • cache_tree — a pointer to the cache_tree struct. yes, the tree. the whole vibe. you need it 🌳
  • key — the cache key you're inserting. the main character of this function, honestly 👑
  • fixup — a bool that says whether this is a new key being inserted. lowkey important, don't skip it 🫶

✨ DESCRIPTION ✨

so what does it actually do? it goes looking for the right spot to insert a new cache key into the cache tree — like finding your seat in a packed lecture hall but make it data structures 🔥

it handles key overlaps (yes, keys can overlap, we don't ask questions) and it makes sure any invalid keys get removed before the insertion happens. so it's not just inserting, it's also doing a little cleanup on the way in. multi-tasking icon behavior 💅✨

🌈 SEE ALSO 🌈

kernel file ./drivers/md/dm-pcache/cache_key.c — go read the source if you're feeling brave, iykyk 🧚

like a whole friend group of functions fr fr 💜

ngl bestie, if you're inserting keys into a dm-pcache cache tree, you're doing something way cooler than whatever i'm doing rn 🫶

and that's the whole page! it lives over in ./drivers/md/dm-pcache, the date on it says October 2026 (futuristic of them honestly ⭐), and we're out 💖 bye bestie, go insert some keys 🌸

📦 where this page comes from