jbd2_journa...lidate_folio(9)

📦 version 7.3.1, in nixpkgs unstable

✨ jbd2_journal_invalidate_folio(9) ✨

okay so this is the kernel API manual page for jbd2_journal_invalidate_folio, bestie 💅 it's giving lowkey mysterious because the NAME section literally has nothing after the dash — no description, no summary, just the function name and a lonely little -. iconic behavior honestly 🎀

🌸 NAME 🌸

jbd2_journal_invalidate_folio — and that's it, that's the whole name section. no blurb. no filler. main character energy fr fr 💀

🦋 SYNOPSIS 🦋

int jbd2_journal_invalidate_folio (journal_t *journal , struct folio
       *folio , size_t offset , size_t length );

that's the whole signature, exactly as written, no cap 🔥 four arguments, returns an int, go off king 👑

🎀 ARGUMENTS 🎀

  • journal — the journal you're gonna use for the flush... yes the original really does trail off into ... and honestly same, mood 😭
  • folio — the folio you're flushing, that's the one 🫶
  • offset — where the range you want to invalidate starts ⭐
  • length — how long that range is, like the size of the invalidate zone 📏

💖 DESCRIPTION 💖

so basically it reaps the page buffers that contain data in the specified range in the page 🧹✨ clean it up, bestie.

⚠️ heads up: it can return -EBUSY if the buffers are part of the committing transaction and the page is straddling i_size. no cap, this is a real thing that can happen 💀

and if that -EBUSY hits? the caller then has to wait for the current commit and try again. that's the whole deal — wait, then retry, periodt 🙈

🌈 SEE ALSO 🌈

kernel file ./fs/jbd2/transaction.c — that's where this lives, iykyk 📁

and here's the whole friend group, all of them, in order, no skipping 👑:

like... the crossover episode nobody asked for but we all needed 💜

okay that's the page!! sign-off time 🫶 this one came from ./fs/jbd2 and it's dated October 2026, and the title is, once again, jbd2_journa...lidate_folio(9) — abridged and slaying and slightly truncated in the middle like a text from your bestie at 2am 🎀✨ bye bestie, go invalidate those folios responsibly 💅🌟

📦 where this page comes from