hugetlb_vmem...timize_folio(9)

okay bestie, welcome to the Kernel API Manual — yes, the actual kernel docs, and yes, we're gonna make it make sense 💖 this page is about hugetlb_vmemmap_optimize_folio(9) and she is that girl.

🌸 NAME 🌸

hugetlb_vmemmap_optimize_folio — optimizes @folio's vmemmap pages, no cap ✨

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🎀 SYNOPSIS 🎀

void hugetlb_vmemmap_optimize_folio (const struct hstate *h , struct folio *folio );

like, that's the whole signature, copy it exactly, iykyk 💅

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🦋 ARGUMENTS 🦋

• h — a struct hstate. that's literally it, she's just a struct, let her be 🫶
• folio — the folio whose vmemmap pages are gonna get optimized. main character energy fr fr 🌟

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✨ DESCRIPTION ✨

okay so listen closely — this function only tries to optimize folio's vmemmap pages. the way that it does not guarantee the optimization will succeed after it returns 😭 like she's doing her best, but she's not making promises.

so if you're the caller and you need to know whether it actually worked, you check with folio_test_hugetlb_vmemmap_optimized(folio) to detect if folio's vmemmap pages have been optimized. that's the vibe check right there 👑

no assuming, bestie. always verify with the test function, periodt 💀

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🌈 SEE ALSO 🌈

• Kernel file ./mm/hugetlb_vmemmap.c
• struct vmemmap_remap_walk(9)
• vmemmap_remap_split(9)
• vmemmap_remap_free(9)
• vmemmap_remap_alloc(9)
• hugetlb_vmemmap_restore_folio(9)
• hugetlb_vmemmap_restore_folios(9)

go read those too, they're all in the same friend group 🧚‍♀️💜

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and that's the page!! sourced straight from ./mm, dated October 2026 — mwah, go optimize some vmemmap pages bestie, you're gonna slay 🎀🔥👑