__account_locked_vm(9)

🌸 NAME 🌸

okay so this is __account_locked_vm(9) from the Kernel API Manual — the whole vibe is: account locked pages to an mm's locked_vm 💅✨

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✨ SYNOPSIS ✨

int __account_locked_vm (struct mm_struct *mm , unsigned long pages ,
bool inc , const struct task_struct *task , bool bypass_rlim );

That's the signature, bestie — copy it exactly, no freestyle edits 🫶

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🎀 ARGUMENTS 🎀

• mm — the mm you're accounting against 💖
• pages — number of pages to account 🍓
• inc — true if pages should be considered positive, false if not ⭐
• task — task used to check RLIMIT_MEMLOCK 👑
• bypass_rlim — true if checking RLIMIT_MEMLOCK should be skipped 💀

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🦋 DESCRIPTION 🦋

Lowkey important vibe check: this function assumes task and mm are valid (i.e. at least one reference on each), and that mmap_lock is held as writer. That's not optional energy — it's the assumption, fr fr 😭

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🔥 RETURN 🔥

• 0 — on success 🎉
• -ENOMEM — if RLIMIT_MEMLOCK would be exceeded 😵‍💫

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🌈 SEE ALSO 🌈

Kernel file ./mm/util.c — plus the whole friend group: kfree_const(9), __kmemdup_nul(9), kstrdup(9), kstrdup_const(9), kstrndup(9), kmemdup(9), kmemdup_array(9), kvmemdup(9), kmemdup_nul(9), memdup_user(9), vmemdup_user(9), strndup_user(9), memdup_user_nul(9), randomize_page(9), account_locked_vm(9), __vmalloc_array(9), vmalloc_array(9), __vcalloc(9), vcalloc(9), folio_mapping(9), folio_copy(9), get_cmdline(9), mem_dump_obj(9), compat_set_desc_from_vma(9), __compat_vma_mmap(9), compat_vma_mmap(9), snapshot_page(9), mmap_action_prepare(9), mmap_action_complete(9), folio_pte_batch(9), page_range_contiguous(9) 💖✨

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source/version is ./mm, and the date on this one is October 2026 — mwah, that's the whole page, periodt 💋🎀