collapse_max_ptes_none(9)

🎀 collapse_max_ptes_none 💅

okay so bestie, this is the Kernel API Manual page for collapse_max_ptes_none(9) — yes, we're in kernel land, and it's giving very specific mm energy. Don't panic, it's shorter than a group-chat argument. 🫶

✨ NAME ✨

collapse_max_ptes_none — calculates the maximum allowed empty PTEs or PTEs mapping the shared zeropage for the given collapse operation. That's the whole assignment, no cap. 💖

🌸 SYNOPSIS 🌸

unsigned int collapse_max_ptes_none (struct collapse_control *cc ,
struct vm_area_struct *vma , unsigned int order );

🦋 ARGUMENTS 🦋

• cc — the collapse control struct, aka struct collapse_control *. It's literally the collapse control struct, so it's main-character energy by default. 💅
• vma — the vma to check for userfaultfd, aka struct vm_area_struct *. yes, we're checking that one. 👀
• order — the folio order being collapsed to (unsigned int). big folio energy. ✨

🔥 RETURN 🔥

It returns the maximum number of empty/shared zeropage PTEs for the collapse operation. That's the number, periodt. 👑

👀 SEE ALSO 👀

Go peek at these, bestie:

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

Catch you later, bestie — this one's collapse_max_ptes_none(9) from source/version ./mm, dated October 2026. bye and slay 💖✨