gsm_dlci_data_sweep(9)

📦 version 7.3.1, in nixpkgs unstable

💖 gsm_dlci_data_sweep(9) 💖

okay so bestie, welcome to the kernel API manual for gsm_dlci_data_sweep — yes that's the whole title, and it lives in the Kernel API Manual section, section 9, the one for kernel functions. this is giving "niche but crucial" and honestly? iconic.

✨ NAME ✨

gsm_dlci_data_sweep — look for data to send 🕵️‍♀️💌

like, that's the whole job. it goes looking. it finds data. it sends. slay.

🌸 SYNOPSIS 🌸

int gsm_dlci_data_sweep (struct gsm_mux *gsm );

it returns an int, it takes a pointer to a struct gsm_mux, and that's the tea 🍵. copy it exactly if you're writing it out, okay? character for character, no improvising.

🎀 ARGUMENTS 🎀

  • gsm — the GSM mux 🫶 that's it. that's the one argument. it's the mux, bestie, the whole multiplexed situation, and we're about to sweep it.

🦋 DESCRIPTION 🦋

okay so here's the vibe: this function sweeps the GSM mux channels in priority order, looking for the ones that have data to send 📬. it goes down the list, priority-style, checking each channel like "you got anything? you? okay you, noted."

and like, lowkey, we could do with optimising this scan a bit — that's straight from the source, not me being shady 😭. the goal is to fill the queue totally or up to TX_THRESH_HI bytes. then, once we hit TX_THRESH_LO, we get called again 🔁. that's the loop. that's the rhythm. main character energy fr fr.

FIXME: we should round robin between groups, and in theory you can renegotiate DLCI priorities with optional stuff. needs optimising 💀 — yes the original really does say that, and no I'm not gonna pretend it doesn't. the code has notes. we respect the notes.

💅 SEE ALSO 💅

this is the part where I hold up the entire friend group and introduce everybody one by one. the kernel file is ./drivers/tty/n_gsm.c, and here's the whole squad, no cap, in order:

every single one, bestie. I counted. I did not skip. we don't skip here 💜.

and that's the whole page! 🧚 source vibes come from ./drivers/tty, dated October 2026, and the page itself is gsm_dlci_data_sweep(9) — so yeah, we came full circle, periodt. go sweep some data, you absolute icon 👑⭐💖

📦 where this page comes from