vdo_make_io_submitter(9)

📦 version 7.3.1, in nixpkgs unstable

💅 vdo_make_io_submitter 💅

okay so bestie, welcome to the Kernel API Manual — section 9 specifically, we're in the deep kernel lore now and honestly? iconic. this is vdo_make_io_submitter(9), and she's here to build you an io_submitter structure. main character constructor energy fr fr 🎀

✨ NAME ✨

vdo_make_io_submitter — literally just creates an io_submitter structure. that's the whole vibe. no cap. 🦋

🌸 SYNOPSIS 🌸

int vdo_make_io_submitter (unsigned int thread_count , unsigned int
rotation_interval , unsigned int max_requests_active , struct vdo *vdo ,
struct io_submitter **io_submitter_ptr );

she takes five arguments and returns an int, and every single one of them matters, so let's go 🫶

💖 ARGUMENTS 💖

  • thread_count — how many bio-submission threads you want her to set up. that's it, that's the number of threads. pick responsibly, bestie ✨
  • rotation_interval — the interval used when rotating between those bio-submission threads while enqueuing completions. yes, she rotates. yes, it's a whole thing. 💫
  • max_requests_active — the number of bios used for merge tracking. merge tracking!! very demure, very mindful. 🌸
  • vdo — the vdo that's gonna be using this submitter. she's doing this for you, vdo. 🥺
  • io_submitter_ptr — a pointer to the new data structure. like, pointer-to-pointer, she writes the shiny new thing back through it. 💅

🔥 RETURN 🔥

VDO_SUCCESS or an error. that's the whole range, bestie — either she ate or she didn't. 😭

🦋 SEE ALSO 🦋

Kernel file ./drivers/md/dm-vdo/io-submitter.c — go read the source, iykyk 👑

and the whole friend group, in the order she lists them:

like, the cleanup twins are right there at the bottom waiting for you when you're done. balance. 🌈

and that's the page!! 🎀 this lil beauty lives over in ./drivers/md/dm-vdo and she's dated October 2026 — so go forth, make your io_submitter, and slay 💜✨👑

📦 where this page comes from