ring_buffer_entries(9)

📦 version 7.3.1, in nixpkgs unstable

💖 ring_buffer_entries(9) 💖

okay so bestie, we're in the Kernel API Manual and today's main character is ring_buffer_entries(9) — yes the (9) means kernel API section, iykyk 🧚

✨ NAME ✨

ring_buffer_entries — get the number of entries in a buffer

🌸 SYNOPSIS 🌸

unsigned long ring_buffer_entries (struct trace_buffer *buffer );

literally that's the whole flex. one function, one job, returns an unsigned long 🫶

🎀 ARGUMENTS 🎀

  • buffer — the ring buffer. that's it. that's the vibe. you hand her the buffer and she tells you things 💅

🦋 DESCRIPTION 🦋

Returns the total number of entries in the ring buffer — and yes, that's all CPU entries, not just one CPU's little slice. the whole group chat, not just the one bestie who's always online 😭

so when you need to know "how much stuff is actually sitting in this buffer rn", this is the function you call. no cap. periodt ✨

👑 SEE ALSO 👑

Kernel file ./kernel/trace/ring_buffer.c, plus the whole extended universe of ring buffer lore — go read these when you're done here, fr fr 🔥

ok that's a LOT of cross-references but she's an icon with a big friend group, what can I say 💀

signed off with love from ./kernel/trace, dated October 2026 — catch you in the next man page bestie, mwah 🍓💜

📦 where this page comes from