prb_commit(9)

💅 prb_commit — like, the kernel API manual edition 🎀

okay bestie, so this one's prb_commit(9) from the Kernel API Manual, and it's literally the glow-up moment for your ringbuffer data ✨

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🌸 NAME 🌸

prb_commit — the moment you commit (previously reserved) data to the ringbuffer, no cap. 💖

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✨ SYNOPSIS ✨

void prb_commit (struct prb_reserved_entry *e );

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🫶 ARGUMENTS 🫶

• e — the entry holding all your reserved data info. it's giving "receipt for your reservation," and you will need it. 🧾

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💫 DESCRIPTION 💫

So this is the public function that's out there for writers to commit data. like, this is your main character moment — the function the writers actually get to call. 👑

but bestie, listen: the data is not yet available to readers until it gets finalized. and the finalizing? it happens automatically when space for the next record is reserved. so you don't have to do anything — the system just handles it on the next reserve. slay, honestly. ⭐

if you're the impatient type and you want it finalized immediately, go look at prb_final_commit — there's literally a version of this function that does exactly that. iykyk. 🦋

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🔥 CONTEXT 🔥

Any context works. 💅 and it enables local interrupts — yes, that's a whole thing, don't come for me, that's just what it does.

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🌈 SEE ALSO 🌈

• the kernel file ./kernel/printk/printk_ringbuffer.c — that's the source, go read it, it's iconic 💜
• printk_ringbuffer overview(9)
• prb_reserve_in_last(9)
• prb_reserve(9)
• prb_final_commit(9)
• prb_next_reserve_seq(9)
• prb_read_valid(9)
• prb_read_valid_info(9)
• prb_first_valid_seq(9)
• prb_next_seq(9)
• prb_init(9)
• prb_record_text_space(9)

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lowkey a reminder for the group chat: commit ≠ available to readers. you need that finalize step, and it comes free with the next reservation. 🎀

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and that's the whole page, bestie — brought to you by ./kernel/printk, dated October 2026, filed under prb_commit(9). periodt. 💅🌸✨