scx_has_subs(9)

💅 scx_has_subs(9) — Kernel API Manual ✨

okay so bestie, welcome to the Kernel API Manual page for scx_has_subs(9) — yes, manual name folded in near the top, periodt 💖

🌸 NAME 🌸

scx_has_subs — Whether any sub-scheduler exists 👑

✨ SYNOPSIS ✨

bool scx_has_subs (void );

🎀 ARGUMENTS 🎀

• void — no arguments. Like, literally none. Not a single one, bestie 🫶

🦋 DESCRIPTION 🦋

So this function gates the sub-sched portions of hot paths so that a root-only system doesn't pay for them 🔥. It’s giving responsible gatekeeper energy, honestly 💅.

And if you wanna peek at the related code, the page points you to scx_sub_enable_workfn and scx_sched_free_rcu_work 👀 — exact names, no cap.

🌈 SEE ALSO 🌈

The kernel file to check is ./kernel/sched/ext/internal.h, and here’s the whole friend group 👯‍♀️:

• scx_add_event(9)
• __scx_add_event(9)
• struct scx_enable_args(9)
• struct sched_ext_ops(9)
• struct sched_ext_ops_cid(9)
• scx_arena_to_kaddr(9)
• scx_kaddr_to_arena(9)
• DEFINE_SCX_COMPAT_MARKER(9)
• scx_root_protected_live(9)
• scx_root_protected(9)
• scx_bypass_dsp_enabled(9)
• scx_ops_sanitize_err(9)
• scx_task_sched(9)
• scx_task_sched_rcu(9)
• scx_task_on_sched(9)
• scx_prog_sched(9)
• scx_parent(9)

okay that’s the whole page, bestie — sourced from ./kernel/sched/ext, dated October 2026 🎀✨. Go forth and gate those hot paths, iykyk 💖