STRUCT PRINTK_BUFFERS(9)

🌸 struct printk_buffers(9) — Kernel API Manual, bestie edition 🌸

okay so picture this: you're deep in the kernel, printk is doing its whole thing, and these two lil buffers are just there, holding your messages together. That's the vibe. This page lives in the Kernel API Manual, section 9, and it's literally just a struct — short, sweet, iconic. 🎀

✨ NAME ✨

struct printk_buffers — the buffers you use to read, format, and output printk messages. no cap, that's the whole job. 💅

🦋 SYNOPSIS 🦋

struct printk_buffers {
    char outbuf[PRINTK_MESSAGE_MAX];
    char scratchbuf[PRINTKRB_RECORD_MAX];
 };

that's it. two char arrays. she's simple, she's efficient, she's serving exactly what she needs to serve. ✨

👑 Members 👑

• outbuf — once the formatting is done, this is where the text you're gonna output actually lives. your main character buffer, fr fr. 💖
• scratchbuf — the little temporary space she gets to use for ringbuffer reading and string-print stuff. think of it as the getting-ready room before the actual message hits the stage 🫶

🔥 SEE ALSO 🔥

• Kernel file ./kernel/printk/internal.h — like, the whole friend group lives here
• nbcon_kthread_wake(9)
• struct console_flush_type(9)
• struct printk_message(9)

go read those too, iykyk 💜

and that's the page!! 🌈 this beauty comes to you from ./kernel/printk, dated October 2026, filed under struct printk_buffers(9) — mwah, slay, periodt 💅💖