virtsnd_pcm_sg_from(9)

📦 version 7.3.1, in nixpkgs unstable

✨ virtsnd_pcm_sg_from(9) — Kernel API Manual ✨

okay bestie, welcome to the virtsnd_pcm_sg_from page, part of the Kernel API Manual 🎀 she's a little function with a big job and honestly? she ate.

💖 NAME 💖

virtsnd_pcm_sg_from — build an sg-list from a vmalloc'ed buffer. that's it, that's the whole vibe ✨

🦋 SYNOPSIS 🦋

void virtsnd_pcm_sg_from (struct scatterlist *sgs , int nsgs , u8 *data
, unsigned int length );

like, look at her. five lines. effortless. 💅

🌸 ARGUMENTS 🌸

  • sgs — the preallocated sg-list you're gonna populate. it's already there, you're just filling it in, no cap 🫶
  • nsgs — the maximum number of elements in the sgs. respect the cap, bestie, it's literally the cap 🙈
  • data — pointer to a vmalloc'ed buffer. vmalloc'ed, okay? don't come at her with anything else 💀
  • length — buffer size. the size. of the buffer. iconic of her honestly 🌈

🔥 DESCRIPTION 🔥

so what she does is: she splits the buffer into physically contiguous parts, and then she makes an sg-list out of those parts.

it's giving organizer energy — one big messy buffer goes in, one tidy sg-list comes out, and she doesn't even break a sweat 💅✨

⭐ CONTEXT ⭐

Any context. literally any. she's flexible like that 🧚

👑 SEE ALSO 👑

kernel file ./sound/virtio/virtio_pcm_msg.c, plus the whole friend group:

go read them all, iykyk 🍓

ok that's the page!! mwah 💜

and before you go — this lil beauty lives in ./sound/virtio, dated October 2026, and yes she's virtsnd_pcm_sg_from(9) all over again at the bottom because she's consistent like that 😭🎀 bye bestie, slay your sg-lists 🌸

📦 where this page comes from