hugetlb_vme...estore_folio(9)

🦋 hugetlb_vme...estore_folio(9) 🦋

okay bestie, so this is from the Kernel API Manual — yes, the actual kernel, we're being that girl today 💅

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✨ NAME ✨

hugetlb_vmemmap_restore_folio — the glow-up-reversal function 💖 it restores vmemmap pages that were previously optimized (by hugetlb_vmemmap_optimize_folio()), and those pages get reallocated and remapped. like, un-slimming them, but make it kernel 🎀

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🌸 SYNOPSIS 🌸

int hugetlb_vmemmap_restore_folio (const struct hstate *h , struct folio *folio );

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🎀 ARGUMENTS 🎀

• h — a struct hstate. that's it, that's the whole description, she's lowkey mysterious like that 🫶
• folio — the folio whose vmemmap pages will be restored. the main character of this whole operation ngl 👑

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⭐ RETURN ⭐

0 if folio's vmemmap pages have been reallocated and remapped 💯 — and a negative error code otherwise. so like, zero is the slay outcome, negatives are the "oop 🙈" outcome.

fr fr, check that return value. 0 good, negative not good. no cap.

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💜 SEE ALSO 💜

• Kernel file ./mm/hugetlb_vmemmap.c — the source, go read her 📖
• struct vmemmap_remap_walk(9)
• vmemmap_remap_split(9)
• vmemmap_remap_free(9)
• vmemmap_remap_alloc(9)
• hugetlb_vmemmap_restore_folios(9) — yes plural, she has a sister 👯‍♀️
• hugetlb_vmemmap_optimize_folio(9) — the one who did the optimizing in the first place, the og 🌈

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and that's the page bestie, we ate and left zero crumbs 🍓 mwah 💋

sign-off szn: this lil beauty lives in ./mm and she was dated October 2026 — iconic, timeless, ahead of her time 👑✨ no thoughts, just hugetlb_vme...estore_folio(9) 🦋💜