rdtgroup_remove(9)

💖 NAME 💖

rdtgroup_remove(9) — okay bestie, from the Kernel API Manual: rdtgroup_remove is the helper to remove a resource group safely, periodt. 🫶

✨ SYNOPSIS ✨

void rdtgroup_remove (struct rdtgroup *rdtgrp );

🎀 ARGUMENTS 🎀

• rdtgrp — the resource group to remove. That's the whole argument, bestie; she's taking one struct rdtgroup * and that's it. 🎀

🦋 DESCRIPTION 🦋

Okay so when a resource group is created via a mkdir, an extra kernfs_node reference is taken. Why? To ensure that the rdtgroup structure remains accessible for the rdtgroup_kn_unlock calls where it is removed. No cap, that extra ref is doing important work. 💅

The default group is statically allocated: it does not have an extra reference, but it will have RDT_DELETED set on unmount to support safe access to its associated files via rdtgroup_kn_lock_live/rdtgroup_kn_unlock. iykyk ✨

For all but the default group: drop the extra reference, then free the rdtgroup structure. That's the whole removal arc. 🦋

🌸 RETURN 🌸

void — literally nothing comes back, bestie. It's giving void and we respect it. 🌸

💅 SEE ALSO 💅

Kernel file ./fs/resctrl/rdtgroup.c is the file bestie, and these are the linked faves:

• closid_allocated(9)
• rdtgroup_mode_by_closid(9)
• rdtgroup_mode_str(9)
• rdtgroup_tasks_assigned(9)
• __rdtgroup_cbm_overlaps(9)
• rdtgroup_cbm_overlaps(9)
• rdtgroup_mode_test_exclusive(9)
• rdtgroup_cbm_to_size(9)
• rdtgroup_kn_mode_restrict(9)
• rdtgroup_kn_mode_restore(9)
• mon_get_kn_priv(9)
• mon_put_kn_priv(9)
• cbm_ensure_valid(9)
• mongrp_reparent(9)
• domain_setup_l3_mon_state(9)
• resctrl_exit(9)

source/version: ./fs/resctrl · date: October 2026 · page: rdtgroup_remove(9) — bye bestie, slay this removal safely 💅✨