cgroup_restore_control(9)

💅 cgroup_restore_control — the Kernel API Manual girlie says hi

okay so bestie, welcome to the Kernel API Manual ✨ this one's a tiny little function but she's IMPORTANT, so let's get into it 🫶

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🌸 NAME 🌸

cgroup_restore_control — the function that restores the control masks and the dom_cgrp of a whole subtree 🎀

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✨ SYNOPSIS ✨

void cgroup_restore_control (struct cgroup *cgrp );

that's it. that's the whole signature. no cap 💅

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🦋 ARGUMENTS 🦋

• cgrp — the root of the target subtree 🌈 like, the top of the little family tree she's about to restore.

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💖 DESCRIPTION 💖

okay so here's the vibe: cgroup_restore_control() restores ->subtree_control, ->subtree_ss_mask and ->dom_cgrp — all three, together, no crumbs left behind 👑

and where does she get those values from? from the respective old_ prefixed fields 🎀 iykyk, the old_ fields are the save file, this function is the load button.

scope check: she does this for cgrp's subtree, including cgrp itself — so the root is not exempt, she's restoring the whole family, main character included 💜

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🔥 SEE ALSO 🔥

so like, here's the entire friend group — every single one of them, fr fr, and they all live in ./kernel/cgroup/cgroup.c 📁

• cgroup_ssid_enabled(9)
• cgroup_on_dfl(9)
• cgroup_e_css_by_mask(9)
• cgroup_e_css(9)
• cgroup_get_e_css(9)
• __cgroup_task_count(9)
• cgroup_task_count(9)
• for_each_css(9)
• do_each_subsys_mask(9)
• css_set_populated(9)
• css_update_populated(9)
• css_set_update_populated(9)
• css_set_move_task(9)
• compare_css_sets(9)
• find_existing_css_set(9)
• allocate_cgrp_cset_links(9)
• link_css_set(9)
• find_css_set(9)
• cgroup_file_mode(9)
• cgroup_calc_subtree_ss_mask(9)
• cgroup_kn_unlock(9)
• cgroup_kn_lock_live(9)
• css_clear_dir(9)
• css_populate_dir(9)
• cgroup_attach_lock(9)
• cgroup_attach_unlock(9)
• cgroup_migrate_add_task(9)
• cgroup_taskset_first(9)
• cgroup_taskset_next(9)
• cgroup_migrate_execute(9)
• cgroup_migrate_vet_dst(9)
• cgroup_migrate_finish(9)
• cgroup_migrate_add_src(9)
• cgroup_migrate_prepare_dst(9)
• cgroup_migrate(9)
• cgroup_attach_task(9)
• cgroup_update_dfl_csses(9)
• cgroup_lock_and_drain_offline(9)
• cgroup_save_control(9)
• cgroup_propagate_control(9)
• cgroup_apply_control_enable(9)
• cgroup_apply_control_disable(9)
• cgroup_apply_control(9)
• cgroup_finalize_control(9)
• cgroup_enable_threaded(9)
• cgroup_tryget_css(9)
• cgroup_addrm_files(9)
• cgroup_rm_cftypes(9)
• cgroup_add_cftypes(9)
• cgroup_add_dfl_cftypes(9)
• cgroup_add_legacy_cftypes(9)
• cgroup_file_notify(9)
• cgroup_file_show(9)
• css_next_child(9)
• css_next_descendant_pre(9)
• css_rightmost_descendant(9)
• css_next_descendant_post(9)
• css_has_online_children(9)
• css_task_iter_advance_css_set(9)
• css_task_iter_start(9)
• css_task_iter_next(9)
• css_task_iter_end(9)
• css_create(9)
• kill_css_sync(9)
• kill_css_finish(9)
• cgroup_destroy_locked(9)
• cgroup_init_early(9)
• cgroup_init(9)
• cgroup_fork(9)
• cgroup_v1v2_get_from_file(9)
• cgroup_get_from_file(9)
• cgroup_css_set_fork(9)
• cgroup_css_set_put_fork(9)
• cgroup_can_fork(9)
• cgroup_cancel_fork(9)
• cgroup_post_fork(9)
• cgroup_task_exit(9)
• css_tryget_online_from_dir(9)
• css_from_id(9)
• cgroup_get_from_path(9)
• cgroup_v1v2_get_from_fd(9)
• cgroup_get_from_fd(9)
• cgroup_parse_float(9)

like, that's the whole group chat and every single one of them ate 🔥 no skips, no "read more", all of them 💀

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aaaand that's the page bestie!! 🧚 this little icon comes to you from ./kernel/cgroup (the source, she lives there 🏠) and it's dated October 2026 ⭐ mwah, go restore some subtrees, you're gonna slay 💅💖🍓