ring_buffer_resize(9)

📦 version 7.3.1, in nixpkgs unstable

💫 ring_buffer_resize(9) 💫

okay bestie, so this is a page from the Kernel API Manual and it's about ring_buffer_resize — yes, exactly what it sounds like, we're changing the size of the ring buffer 🎀 lowkey a glow-up for your trace buffer, ngl.

✨ NAME ✨

ring_buffer_resize — resize the ring buffer 💅

🌸 SYNOPSIS 🌸

int ring_buffer_resize (struct trace_buffer *buffer , unsigned long size
, int cpu_id );

ok so it's giving int, it takes three things, and you're gonna wanna read the next section fr fr 🫶

🦋 ARGUMENTS 🦋

  • buffer — the buffer to resize. that's the main character right there 👑
  • size — the new size. the new lewk ✨
  • cpu_id — the cpu buffer to resize. yes, per-cpu, we love a specific queen 💜

🌈 DESCRIPTION 🌈

kay so the minimum size? it's 2 * rb_subbuf_capacity(buffer). that's the floor, bestie, don't go below it 🙈

and the returns: 0 on success, and < 0 on failure. literal success vs. the flop era 😭

ngl, that's the whole description — short and iconic. periodt 💅

⭐ SEE ALSO ⭐

the kernel file is ./kernel/trace/ring_buffer.c — that's where the magic lives 🧚 and here's the whole friend group, no one left out, fr fr:

and that's the whole vibe check 💖 this page lives in ./kernel/trace, dated October 2026, and it's still ring_buffer_resize(9) at the end of the day — slay, go resize something responsibly, bestie 🌸💅🫶

📦 where this page comes from