kmsg_dump_get_line(9)

💖 kmsg_dump_get_line(9) 💖

okay bestie, welcome to the Kernel API Manual page for kmsg_dump_get_line — it’s giving “retrieve exactly one kmsg log line” energy and honestly it ate. no cap, every single detail is staying, so let’s go. 💅

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✨ NAME ✨

kmsg_dump_get_line - retrieve one kmsg log line

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🌸 SYNOPSIS 🌸

bool kmsg_dump_get_line (struct kmsg_dump_iter *iter , bool syslog ,
char *line , size_t size , size_t *len );

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🎀 ARGUMENTS 🎀

• iter — kmsg dump iterator. it’s the little buddy keeping track of where we are.
• syslog — include the "<4>" prefixes.
• line — buffer to copy the line to.
• size — maximum size of the buffer.
• len — length of line placed into buffer.

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🦋 DESCRIPTION 🦋

okay so here’s the vibe: start at the beginning of the kmsg buffer, with the oldest kmsg record, and copy one record into the provided buffer. very “first day of school, oldest message gets picked first” of it all. 🎀

Consecutive calls will return the next available record moving towards the end of the buffer with the youngest messages. it’s literally walking down the log line by line, bestie. iykyk.

A return value of FALSE indicates that there are no more records to read. that’s your “we’re done here” signal — not me refreshing the group chat hoping for more. 😭

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👑 SEE ALSO 👑

the kernel file ./kernel/printk/printk.c is main character energy here, and these functions are all in the group chat:

• 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)
• 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_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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xoxo, your kernel bestie 🫶💅 — source/version: ./kernel/printk; date: October 2026; manual page: kmsg_dump_get_line(9). periodt. ✨