mem_cgroup_charge_hugetlb(9)

💅 mem_cgroup_charge_hugetlb(9) 💅

Okay bestie, welcome to this page from the Kernel API Manual 🫶. We’re talking about mem_cgroup_charge_hugetlb(9) today, and it’s honestly giving “small function, big memcg responsibilities” energy 👑.

💖 NAME 💖

mem_cgroup_charge_hugetlb — charge the memcg for a hugetlb folio 💸✨

✨ SYNOPSIS ✨

int mem_cgroup_charge_hugetlb (struct folio *folio , gfp_t gfp );

🎀 ARGUMENTS 🎀

• folio — the folio being charged 💖
• gfp — reclaim mode 🌱

🦋 DESCRIPTION 🦋

Okay so here’s the vibe: this function is called when allocating a huge page folio, after the page has already been obtained and charged to the appropriate hugetlb cgroup controller (if it is enabled) ✨.

If the memcg is already full, it returns ENOMEM 😭. If the charge was successful — or if we skip the charging — it returns 0 🫶.

🌸 SEE ALSO 🌸

The kernel file is ./mm/memcontrol.c 👀. And here’s the whole related squad, same order, no cap:

• get_mem_cgroup_css_from_folio(9)
• page_cgroup_ino(9)
• lruvec_page_state_monotonic(9)
• mod_memcg_state(9)
• mod_lruvec_state(9)
• count_memcg_events(9)
• get_mem_cgroup_from_mm(9)
• get_mem_cgroup_from_current(9)
• get_mem_cgroup_from_folio(9)
• mem_cgroup_iter(9)
• mem_cgroup_iter_break(9)
• mem_cgroup_scan_tasks(9)
• folio_lruvec_lock(9)
• folio_lruvec_lock_irq(9)
• folio_lruvec_lock_irqsave(9)
• mem_cgroup_update_lru_size(9)
• mem_cgroup_margin(9)
• mem_cgroup_print_oom_context(9)
• mem_cgroup_print_oom_meminfo(9)
• mem_cgroup_get_oom_group(9)
• consume_stock(9)
• __memcg_kmem_charge_page(9)
• __memcg_kmem_uncharge_page(9)
• mem_cgroup_wb_stats(9)
• mem_cgroup_from_private_id(9)
• mem_cgroup_css_reset(9)
• mem_cgroup_calculate_protection(9)
• mem_cgroup_swapin_charge_folio(9)
• mem_cgroup_replace_folio(9)
• mem_cgroup_migrate(9)
• mem_cgroup_sk_charge(9)
• mem_cgroup_sk_uncharge(9)
• __mem_cgroup_try_charge_swap(9)
• __mem_cgroup_uncharge_swap(9)
• obj_cgroup_may_zswap(9)
• obj_cgroup_charge_zswap(9)
• obj_cgroup_uncharge_zswap(9)

This page’s source/version is ./mm, dated October 2026, and the manual page name is mem_cgroup_charge_hugetlb(9). Byeee, go slay your kernel adventures 💅✨🌸