hugetlb_alloc_folio(9)

okay bestie, this is hugetlb_alloc_folio(9) from the Kernel API Manual 💅 and it's literally the page about allocating a hugetlb folio. stay with me, it's not scary, i promise 🫶

✨ NAME ✨

hugetlb_alloc_folio — allocate a hugetlb folio. periodt. 💖

🌸 SYNOPSIS 🌸

struct folio * hugetlb_alloc_folio (struct hstate *h , struct
       mempolicy_interpreted *mpoli , u8 alloc_flags );

🎀 ARGUMENTS 🎀

• h — the hugetlb state control block. yes bestie, the state girlie.
• mpoli — the interpreted memory policy to use for this allocation.
• alloc_flags — flags controlling the allocation behavior. tiny but important, lowkey.

💖 DESCRIPTION 💖

this one allocates a hugetlb folio and handles cgroup charging + global hstate reservations. it's giving "i got you, bestie" energy fr fr. ✨

🔥 RETURN 🔥

you get a pointer to the allocated folio on the success path 🌈 or an ERR_PTR on failure 😭. the error specifics are:

• -ENOSPC — if cgroup charging fails, or if no folio is available. 💀
• -ENOMEM — if mem cgroup charging fails. 😭

👑 SEE ALSO 👑

kernel file ./mm/hugetlb.c, plus these icon besties: huge_pmd_unshare(9), folio_isolate_hugetlb(9), and folio_putback_hugetlb(9). iykyk 🦋

okay that's the page, bestie 🫶 the source/version is ./mm, the date is October 2026, and the page itself is hugetlb_alloc_folio(9). slay and goodbye 💅✨