sched_use_asym_prio(9)

💅 sched_use_asym_prio(9) 💅

okay bestie, this is from the Kernel API Manual, and it’s literally about sched_use_asym_prio — the little check for whether asym_packing priority must be used ✨

🌸 NAME 🌸

sched_use_asym_prio — Check whether asym_packing priority must be used.

✨ SYNOPSIS ✨

bool sched_use_asym_prio (struct sched_domain *sd , int cpu );

🎀 ARGUMENTS 🎀

• sd — The scheduling domain of the load balancing. it’s giving “where the balancing drama is happening” vibes 💖
• cpu — A CPU. yep, just a CPU, bestie 🫶

🦋 DESCRIPTION 🦋

Okay so here’s the tea: always use CPU priority when balancing load between SMT siblings. When balancing load between cores, it is not sufficient that cpu is idle. Only use CPU priority if the whole core is idle. 🔥

💖 RETURN 💖

Returns True if the priority of cpu must be followed. False otherwise. periodt 💅

🌈 SEE ALSO 🌈

Kernel file ./kernel/sched/fair.c — plus these besties:

• update_tg_load_avg(9)
• update_cfs_rq_load_avg(9)
• attach_entity_load_avg(9)
• detach_entity_load_avg(9)
• cpu_util(9)
• sched_group_asym(9)
• update_sg_lb_stats(9)
• update_sd_pick_busiest(9)
• idle_cpu_without(9)
• update_sd_lb_stats(9)
• calculate_imbalance(9)
• sched_balance_find_src_group(9)

that’s the whole page, bestie 💖 source/version ./kernel/sched, dated October 2026, page sched_use_asym_prio(9) — mwah 💋✨