rdtgroup_pseudo_lock_create(9)

okay so bestie, welcome to rdtgroup_pseudo_lock_create(9) — the kernel API manual page for creating a pseudo-locked region. it’s giving lowkey resctrl realness, and we’re gonna read it together 💖✨

🎀 NAME 🎀

rdtgroup_pseudo_lock_create — Create a pseudo-locked region 🌸

🦋 SYNOPSIS 🦋

int rdtgroup_pseudo_lock_create (struct rdtgroup *rdtgrp );

🌈 ARGUMENTS 🌈

• rdtgrp — the resource group to which the pseudo-lock region belongs. like, this is the group bestie, no cap 🫶

✨ DESCRIPTION ✨

So this function gets called when a resource group that’s chilling in pseudo-locksetup mode receives a valid schemata that should be pseudo-locked. because the resource group is in pseudo-locksetup mode, the struct pseudo_lock_region has already been allocated and initialized with the essential information. iconic setup behavior, honestly 💅

small but important note: if a failure occurs, the resource group remains in the pseudo-locksetup mode with the struct pseudo_lock_region associated with it, but cleared from all information and ready for the user to re-attempt pseudo-locking by writing the schemata again. so it’s not down bad forever — it’s ready for a retry 😭✨

💜 RETURN 💜

• 0 if the pseudo-locked region was successfully pseudo-locked, <0 on failure.
• a descriptive error will be written to the last_cmd_status buffer. yes bestie, it tells you what went wrong 🩷

🔥 SEE ALSO 🔥

kernel file ./fs/resctrl/pseudo_lock.c — and here’s the whole bestie lineup:

• pseudo_lock_minor_get(9)
• pseudo_lock_minor_release(9)
• region_find_by_minor(9)
• struct pseudo_lock_pm_req(9)
• pseudo_lock_cstates_constrain(9)
• pseudo_lock_region_clear(9)
• pseudo_lock_region_init(9)
• pseudo_lock_init(9)
• pseudo_lock_region_alloc(9)
• pseudo_lock_free(9)
• rdtgroup_monitor_in_progress(9)
• rdtgroup_locksetup_user_restrict(9)
• rdtgroup_locksetup_user_restore(9)
• rdtgroup_locksetup_enter(9)
• rdtgroup_locksetup_exit(9)
• rdtgroup_cbm_overlaps_pseudo_locked(9)
• rdtgroup_pseudo_locked_in_hierarchy(9)
• pseudo_lock_measure_cycles(9)
• rdtgroup_pseudo_lock_remove(9)

mwah 💋 that’s the whole page — source/version: ./fs/resctrl, date: October 2026, page: rdtgroup_pseudo_lock_create(9). ily, byeee 🫶🎀