scx_bpf_create_dsq(9)

📦 version 7.3.1, in nixpkgs unstable

💅 scx_bpf_create_dsq (9) — from the Kernel API Manual, bestie 🫶

okay so real talk, this is a kernel-level sched-ext function from the Kernel API Manual, and it's literally the "make me a brand new DSQ" button. custom queue, your own vibes, your own rules. let's get into it 💖

✨ NAME ✨

scx_bpf_create_dsq — the one where you create a custom DSQ ✨

🦋 SYNOPSIS 🦋

__bpf_kfunc s32 scx_bpf_create_dsq (u64 dsq_id , s32 node , const struct
       bpf_prog_aux *aux );

like... that's the whole signature, no cap. s32 coming back at you, three args going in 🌸

🎀 ARGUMENTS 🎀

  • dsq_id — the DSQ you wanna create. that's the ID, that's the name tag, that's the whole identity 🪪
  • node — the NUMA node you're allocating from. pick your fave, it's literally a NUMA node choice moment ✨
  • aux — ok so this one's implicit. it's the BPF argument that gives you access to bpf_prog_aux, and it is hidden from BPF progs. so your prog doesn't see it, doesn't touch it, it's giving backstage pass energy 🙈

👑 DESCRIPTION 👑

so you call this, and it creates a custom DSQ identified by dsq_id. that's it, that's the whole flex 💅

where can you call it from? glad you asked bestie:

  • any sleepable scx callback — yes, sleepable ones, go off 😴✨
  • any BPF_PROG_TYPE_SYSCALL prog — those count too, we love a syscall prog 🫶

and that's the entire description, no filler, no side quests. iconic behaviour honestly 🌈

💜 SEE ALSO 💜

okay this list is long long, so buckle up, we're going through all of it, every single one, i'm not skipping a crumb 🍓

first up, the kernel file itself: ./kernel/sched/ext/ext.c — that's where the sauce lives, iykyk 🔥

then the whole friend group:

like i said. everyone's here. the whole extended universe 🌌💜

and that's the tea ☕✨ go create your DSQ bestie, you got this 💅🦋

this little gem lives in ./kernel/sched/ext and it's stamped October 2026 — so yeah, save the date, screenshot it, whatever, mwah 🎀💖

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