jbd2_journal_shrink_count(9)

📦 version 7.3.1, in nixpkgs unstable

💖 jbd2_journal_shrink_count(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the jbd2_journal_shrink_count page and honestly it's a little cutie. she's short, she's sweet, she counts things. let's get into it 🎀

✨ NAME ✨

jbd2_journal_shrink_count — literally just here to count checkpoint buffers (the manpage leaves the one-liner blank, so consider this the group-chat translation 💅)

🌸 SYNOPSIS 🌸

unsigned long jbd2_journal_shrink_count (struct shrinker *shrink ,
struct shrink_control *sc );

it returns an unsigned long, bestie. that's the number. iconic. ⭐

🦋 ARGUMENTS 🦋

  • shrink — the shrinker to work on 🧹 like, the actual shrinker object you're doing the work for. main character of this function, tbh.
  • sc — the reclaim request to process 🌈 this is the request itself, and you're gonna process it. that's the vibe.

👑 DESCRIPTION 👑

Count the number of checkpoint buffers on the checkpoint list. ✨

that's it. that's the whole function. she counts checkpoint buffers, she's on the checkpoint list, she does it well 🙈 no cap, sometimes the simplest ones ate the most.

💜 SEE ALSO 💜

Kernel file ./fs/jbd2/journal.c — go read the source, iykyk 🫶 and also these absolutely iconic siblings of hers, go say hi:

like, that's a whole friend group. go follow them all. 🔥

and that's the page!! 💖 this little love letter lives in ./fs/jbd2 and it's dated October 2026, and yes she's still jbd2_journal_shrink_count(9) — same queen, same manual. mwah 🎀✨💅

📦 where this page comes from