wake_up_klogd(9)

💖 wake_up_klogd(9) 💖

okay so this is a page from the Kernel API Manual — yes, that Kernel API Manual — and bestie, it's a tiny one, but it's lowkey iconic. let's get into it ✨

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🌸 NAME 🌸

wake_up_klogd — literally just: wake the kernel logging daemon. that's the whole vibe check. 🫶

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🎀 SYNOPSIS 🎀

void wake_up_klogd (void );

no cap, that's the entire signature. she's giving minimalist main character energy. 💅

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🦋 ARGUMENTS 🦋

• void — no arguments. none. zero. nada. she takes nothing and she gives everything 🙈

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✨ DESCRIPTION ✨

so here's when you'd call her, bestie 👑

call this function when new records have been added to the ringbuffer and the console printing of those records has already occurred or is known to be handled by some other context. iykyk — somebody else already did the printing part. 💀

in that exact situation, this function will only wake the logging daemon. that's it. that's her whole job. not me being obsessed with a function that does one thing and does it well 🎀

🚨 read that again fr fr: she does not print anything herself. she does not handle the console. she just wakes the daemon. don't ask her for more, she's booked and busy.

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🌈 CONTEXT 🌈

Any context. any. all of them. she does not care where you're calling from, she's ready 💖

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👑 SEE ALSO 👑

okay this is the part where the friend group shows up — the whole ./kernel/printk/printk.c crew, plus the extended fam. every single one of them, no gatekeeping 🫶

console_list_lock(9), console_list_unlock(9), console_srcu_read_lock(9), console_srcu_read_unlock(9), console_lock_spinning_enable(9), console_lock_spinning_disable_and_check(9), console_trylock_spinning(9), printk_parse_prefix(9), add_preferred_console(9), match_devname_and_update_preferred_console(9), console_suspend_all(9), console_cpu_notify(9), console_lock(9), console_trylock(9), console_unlock(9), console_flush_on_panic(9), printk_kthreads_shutdown(9), console_force_preferred_locked(9), pr_flush(9), defer_console_output(9), printk_trigger_flush(9), printk_timed_ratelimit(9), kmsg_dump_register(9), kmsg_dump_unregister(9), kmsg_dump_desc(9), kmsg_dump_get_line(9), kmsg_dump_get_buffer(9), kmsg_dump_rewind(9), console_try_replay_all(9), __printk_cpu_sync_wait(9), __printk_cpu_sync_try_get(9), __printk_cpu_sync_put(9)

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and that's the page, bestie 🧚💜 she lives in ./kernel/printk, and this edition dropped October 2026 — so go forth, wake that daemon, and slay ⭐🔥