defer_console_output(9)

💖 defer_console_output(9) — Kernel API Manual ✨

okay bestie, welcome to the defer_console_output(9) page, live from the Kernel API Manual 🎀 this one's short but she's important, so like… pay attention, iykyk 💅

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🌸 NAME 🌸

defer_console_output — wake the kernel logging daemon and trigger console printing in a deferred context 🦋

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✨ SYNOPSIS ✨

void defer_console_output (void );

like, that's the whole thing. she's a void girlie with no args. periodt 💜

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🎀 ARGUMENTS 🎀

• void — no arguments. literally none. zero. nada. she takes nothing and she gives you console output, iconic honestly 👑

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💫 DESCRIPTION 💫

okay so here's the vibe 🌈 use this function when new records have been added to the ringbuffer, and this context is the one responsible for console printing those records — but the current context is not allowed to perform the console printing 🙈

so what do you do? you trigger an irq_work context to do the console printing for you, bestie. that's the whole move ✨

oh and it's not just the printing — this function also wakes the logging daemon 😭 like a little two-for-one deal, we love a multitasker 🫶

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🔥 CONTEXT 🔥

Any context. yeah. any. she's flexible like that 💅

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🌟 SEE ALSO 🌟

Kernel file ./kernel/printk/printk.c — and honestly, the whole printk friend group showed up for this one, so let's give them their moment 👑

• 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)
• wake_up_klogd(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)

like, that's the entire group chat and they all ate 💀🔥

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and that's the page bestie!! 🍓 this lil beauty lives in ./kernel/printk and the manual's dated October 2026, filed under defer_console_output(9) — mwah, go forth and defer that console output responsibly 🧚💖