ring_buffer_...uf_order_get(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ring_buffer_...uf_order_get(9) — bestie edition ✨

okay so real talk, this page lives in the Kernel API Manual, section 9, and it's about one very specific little question: what order is your sub page, babe? 🎀 stay with me, it's gonna slay.

✨ NAME ✨

ring_buffer_subbuf_order_get — get the order of system sub pages in one buffer page. literally just a lil getter, no cap 🫶

🌸 SYNOPSIS 🌸

int ring_buffer_subbuf_order_get (struct trace_buffer *buffer );

one function, one argument, one int coming back at you. iconic behaviour honestly. 💅

🦋 ARGUMENTS 🦋

  • buffer — the ring_buffer you wanna get the system sub page order from. that's it, that's the whole vibe. pass it in, get your answer. ✨

💖 DESCRIPTION 💖

so here's the lore 📖 — by default, one ring buffer sub page equals one system page. that's the starting point, the default fit, the no-thoughts-just-vibes config.

but bestie, it's configurable — per ring buffer, okay? per. ring. buffer. so you can absolutely go off and make the ring buffer sub page size bigger if you want. the one rule: it must be an order of system page size. no chaos allowed, only powers of two energy. 🌈

and what does this function actually give you back? it returns the order of the buffer sub page size, in system pages — so like:

  • 0 means the sub buffer size is 1 system page
  • and so forth. you get it. the math is mathing. 🔥

and if something goes wrong? in case of an error, a value < 0 is returned. so if you see a negative number, that's not a vibe, that's a problem, go check yourself before you wreck yourself. 💀

👑 SEE ALSO 👑

the kernel file this lives in: ./kernel/trace/ring_buffer.c — go read it, it's giving main character energy 📚

and the whole ring buffer friend group 🫶 (they all showed up to the group chat):

that's the whole page bestie, go forth and get that order 🌟 mwah 💋

and yes, the credits ily: this one's from ./kernel/trace, dated October 2026, and the footer still calls it ring_buffer_...uf_order_get(9) because the header line got truncated and we're all just living with it 🙈 periodt.
📦 where this page comes from