n_tty_receive_overrun(9)

💅 n_tty_receive_overrun(9) — a Kernel API Manual moment

okay bestie, so this one lives in the Kernel API Manual and it's called n_tty_receive_overrun, and honestly? it's giving "the cleanup crew of the tty world." let's get into it ✨

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🌸 NAME 🌸

n_tty_receive_overrun — handle overrun reporting 🫶

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✨ SYNOPSIS ✨

void n_tty_receive_overrun (const struct tty_struct *tty );

that's it. one function, one arg, zero drama. iconic.

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🎀 ARGUMENTS 🎀

• tty — the terminal 💻 (that's literally what it is, no cap)

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🦋 DESCRIPTION 🦋

okay so picture this: data arrived faster than we could process it. the tty driver has already flagged that this happened, but — and this is the heartbreaking part — the bits that were missed are gone forever. 😭 not "recoverable later," not "in a buffer somewhere," just poof. bestie, they're not coming back.

this function gets called from the receive_buf path, which means it's single threaded — so it's lowkey chilling, it does not need locking, because num_overrun and overrun_time are function private. nobody else is touching them, so we don't have to fight over them. slay. 🙈

tl;dr: overrun happened, the data's gone, we report it, we move on. main character energy. 👑

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/tty/n_tty.c — and while you're there, the whole friend group:
• n_tty_kick_worker(9)
• n_tty_write_wakeup(9)
• put_tty_queue(9)
• reset_buffer_flags(9)
• n_tty_flush_buffer(9)
• is_utf8_continuation(9)
• is_continuation(9)
• do_output_char(9)
• process_output(9)
• process_output_block(9)
• __process_echoes(9)
• add_echo_byte(9)
• echo_move_back_col(9)
• echo_set_canon_col(9)
• echo_erase_tab(9)
• echo_char_raw(9)
• echo_char(9)
• finish_erasing(9)
• eraser(9)
• isig(9)
• n_tty_receive_break(9)
• n_tty_receive_parity_error(9)
• n_tty_receive_char_flow_ctrl(9)
• n_tty_receive_char(9)
• n_tty_receive_buf_common(9)
• n_tty_set_termios(9)
• n_tty_close(9)
• n_tty_open(9)
• copy_from_read_buf(9)
• canon_copy_from_read_buf(9)
• job_control(9)
• n_tty_read(9)
• n_tty_write(9)
• n_tty_poll(9)
• n_tty_inherit_ops(9)

that's the whole group chat, fr fr. go read them all, iykyk 🧚💜

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gentle reminder bestie: once those bits are missed, they are missed. there is no undo. guard your throughput accordingly 💀

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and that's the whole page! this lil cutie came from ./drivers/tty, dated October 2026 🌈🦋 mwah, go read the source, ily, bye! 💖⭐