collapse_max_ptes_shared(9)

💅 collapse_max_ptes_shared(9)

okay so this is a page straight out of the Kernel API Manual, and yes it's a (9) section situation, we love that for us 🎀

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✨ NAME ✨

collapse_max_ptes_shared — bestie, this one does math for you: it calculates the maximum allowed PTEs that map shared anonymous pages for whatever collapse operation you're doing 🧚

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🌸 SYNOPSIS 🌸

unsigned int collapse_max_ptes_shared (struct collapse_control *cc ,
       unsigned int order );

that's the whole vibe, no cap 🫶

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💖 ARGUMENTS 💖

• cc — the collapse control struct, aka the main character carrying all the context 💅
• order — the folio order you're collapsing to, like the destination of the whole glow-up ✨

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🔥 RETURN 🔥

it hands you back the maximum number of PTEs that map shared anonymous pages for the collapse operation. that's the answer, that's the tea, periodt 👑

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🦋 SEE ALSO 🦋

• Kernel file ./mm/khugepaged.c
• struct khugepaged_scan(9)
• collapse_max_ptes_none(9)
• collapse_max_ptes_swap(9)
• collapse_pte_mapped_thp(9)
• collapse_file(9)

like, go read the whole friend group, they're all iconic 😭💜

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and that's the page!! sign-off time: this lil masterpiece lives in ./mm and it's dated October 2026 — so go forth, collapse those PTEs responsibly, ily bye 🎀🌈⭐