__cmask_init(9)

okay bestie, welcome to the Kernel API Manual 💖 this is the page for __cmask_init(9), and she is literally here to initialize your cmask with explicit storage capacity. no cap, she's iconic for exactly that.

✨ NAME ✨

__cmask_init — initialize @m with explicit storage capacity

🎀 SYNOPSIS 🎀

void __cmask_init (struct scx_cmask __arena *m , u32 base , u32 nr_cids
       , u32 alloc_cids );

💅 ARGUMENTS 💅

• m — the cmask you're initializing, bestie.
• base — first cid of the active range.
• nr_cids — number of cids in the active range.
• alloc_cids — storage capacity in cids, and it has to be at least nr_cids.

🦋 DESCRIPTION 🦋

use this when your storage is sized larger than the initial active range. also, heads up: all of bits[] is zeroed. periodt.

🌸 SEE ALSO 🌸

• Kernel file ./tools/sched_ext/include/scx/cid.bpf.h
• cmask_init(9), cmask_reframe(9), cmask_next_set(9), cmask_from_cpumask(9)

mwah 💋 source/version: ./tools/sched_ext/include/scx; date: October 2026; page: __cmask_init(9). that's the whole footer, bestie, no cap 🫶