validate_partition(9)

💖 validate_partition(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for validate_partition, and it is literally here to validate a cpuset partition configuration. no cap. 🎀

✨ NAME ✨

validate_partition — validate a cpuset partition configuration. that's the whole gig, and it ate. 💅

🌸 SYNOPSIS 🌸

enum prs_errcode validate_partition (struct cpuset *cs , struct cpuset *trialcs );

🦋 ARGUMENTS 🦋

• cs — the cpuset to validate. main character energy, but make it a cpuset. 👑
• trialcs — the trial cpuset containing proposed configuration changes. it's giving “what if we changed stuff” energy. ✨

💜 DESCRIPTION 💜

okay so here's the tea: if any validation check fails, the appropriate error code is set in the cpuset's prs_err field. that's the whole description, bestie — short and iconic. fr fr. 🫶

🔥 RETURN 🔥

It returns a PRS error code: 0 if valid, non-zero error code if invalid. so 0 is the slay case, non-zero is the “not today” case. periodt. 💅

🌈 SEE ALSO 🌈

The kernel file in question is ./kernel/cgroup/cpuset.c, and these besties are all in the SEE ALSO squad:

• cpuset_lock(9)
• cpuset_full_lock(9)
• partition_is_populated(9)
• alloc_cpumasks(9)
• alloc_tmpmasks(9)
• free_tmpmasks(9)
• dup_or_alloc_cpuset(9)
• free_cpuset(9)
• cpus_excl_conflict(9)
• cpuset_update_tasks_cpumask(9)
• compute_effective_cpumask(9)
• compute_effective_nodemask(9)
• rm_siblings_excl_cpus(9)
• update_parent_effective_cpumask(9)
• compute_partition_effective_cpumask(9)
• update_sibling_cpumasks(9)
• partition_cpus_change(9)
• update_cpumask(9)
• update_exclusive_cpumask(9)
• cpuset_update_tasks_nodemask(9)
• update_prstate(9)
• cpuset_css_alloc(9)
• cpuset_init(9)
• cpuset_hotplug_update_tasks(9)
• cpuset_handle_hotplug(9)
• cpuset_init_smp(9)
• cpuset_cpus_allowed_locked(9)
• cpuset_cpus_allowed(9)
• cpuset_cpus_allowed_fallback(9)
• cpuset_mems_allowed(9)
• cpuset_nodemask_valid_mems_allowed(9)
• cpuset_nodes_allowed(9)
• cpuset_spread_node(9)
• cpuset_mem_spread_node(9)
• cpuset_mems_allowed_intersects(9)
• cpuset_print_current_mems_allowed(9)

kisses from the ./kernel/cgroup girlies — October 2026 💅✨