folio_alloc_swap(9)

💅 folio_alloc_swap(9) — like, the Kernel API Manual page, bestie 🎀

okay so picture this: we're in the Kernel API Manual and this little icon is about to get swap space sorted for a folio. yes we're doing kernel memory management in the group chat. slay. 💖

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✨ NAME ✨

folio_alloc_swap — allocate swap space for a folio 🦋

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🌸 SYNOPSIS 🌸

int folio_alloc_swap (struct folio *folio );

literally copy that exactly, don't @ me about the spacing 🙈

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🎀 ARGUMENTS 🎀

• folio — the folio we want to move to swap. that's the whole vibe. she's the main character here 👑

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⭐ DESCRIPTION ⭐

So what she does: allocate swap space for the folio, then add the folio to the swap cache. that's it, that's the function. two jobs, both iconic, no notes. ✨

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🫶 CONTEXT 🫶

Heads up bestie: the caller needs to hold the folio lock before calling this. no lock, no entry. 🔒

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💜 RETURN 💜

Returns whether the folio was added to the swap cache. yes/no energy. iykyk. 🌈

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🔥 SEE ALSO 🔥

Kernel file ./mm/swapfile.c — plus the whole friend group:

• swap_put_entries_cluster(9)
• swap_dup_entries_cluster(9)
• folio_dup_swap(9)
• folio_put_swap(9)
• swap_entry_swapped(9)
• folio_free_swap(9)
• swap_put_entries_direct(9)
• swap_alloc_hibernation_slot(9)
• swap_free_hibernation_slot(9)
• pin_hibernation_swap_type(9)
• unpin_hibernation_swap_type(9)
• find_hibernation_swap_type(9)

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okay that's the whole page!! 🎉 this lives under ./mm, it's from October 2026, and it's folio_alloc_swap(9) forever and always. go forth and swap your folios, bestie — ily, drink some water, and may your locks always be held 💅💖🧚‍♀️