mem_cgroup_margin(9)

💖 mem_cgroup_margin 💖

okay so bestie, we're diving into the Kernel API Manual today and the star of the show is mem_cgroup_margin — yes she's a kernel function, yes she's iconic, and yes we're gonna get through this together 🫶

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🌸 NAME 🌸

mem_cgroup_margin — literally just here to calculate the chargeable space of a memory cgroup, no biggie 💅

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✨ SYNOPSIS ✨

unsigned long mem_cgroup_margin (struct mem_cgroup *memcg );

that's it. that's the whole vibe check. one function, one argument, returns an unsigned long 🔥

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🎀 ARGUMENTS 🎀

• memcg — the memory cgroup herself, the main character, the one we're doing math about 👑

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🦋 DESCRIPTION 🦋

okay so what does she actually do? She returns the maximum amount of memory that mem can be charged with, and it's measured in pages ngl 📄📄📄

that's the whole description. short, sweet, ate and left no crumbs 💀✨

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💜 SEE ALSO 💜

bestie the cross-reference list is giving extended universe, like she knows everybody, she's connected, iykyk 🌈

• Kernel file ./mm/memcontrol.c
• 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_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_charge_hugetlb(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)

like… she has so many friends, it's lowkey inspiring 😭💖

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anyway that's the whole page bestie, 10/10 no notes 🧚 this little cutie lives under ./mm and the version we're looking at is dated October 2026 — so mark your calendars, screenshot it, send it to the group chat, slay 💅🎀⭐