kho_unpreserve_pages(9)

💅 kho_unpreserve_pages(9)

okay bestie, welcome to the kernel API manual — this one lives in the kho_unpreserve_pages corner of the universe and honestly it's giving "short but important" main character energy ✨

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🌸 NAME 🌸

kho_unpreserve_pages — unpreserve contiguous pages. that's it, that's the whole vibe 🎀

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🦋 SYNOPSIS 🦋

void kho_unpreserve_pages (struct page *page , unsigned long nr_pages );

literally just a void function, no return value, no drama, no notes 💅

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⭐ ARGUMENTS ⭐

• page — the first page in the list. bestie, this is where the party starts 🫶
• nr_pages — number of pages. like, how many we're talking about here 🔥

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💖 DESCRIPTION 💖

so here's the tea ☕ — this function instructs KHO to unpreserve nr_pages contiguous pages starting from page.

⚠️ and this part is important, so listen up: you must call this with the same page and nr_pages as the corresponding kho_preserve_pages call. matching set, no mix and match, iykyk 🙈

and ngl, unpreserving arbitrary sub-ranges of larger preserved blocks is not supported. so don't try to get cute with a lil slice of a big block — it's not gonna slay, it's just gonna fail 💀 periodt.

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👑 SEE ALSO 👑

kernel file ./kernel/liveupdate/kexec_handover.c — go read it, it's right there 🌈

• kho_encode_radix_key(9)
• kho_decode_radix_key(9)
• kho_radix_add_key(9)
• kho_radix_del_key(9)
• kho_radix_init_tree(9)
• kho_radix_destroy_tree(9)
• kho_radix_walk_tree(9)
• kho_restore_folio(9)
• kho_restore_pages(9)
• kho_reserve_scratch(9)
• kho_add_subtree(9)
• kho_preserve_folio(9)
• kho_unpreserve_folio(9)
• kho_preserve_pages(9)
• kho_preserve_vmalloc(9)
• kho_unpreserve_vmalloc(9)
• kho_restore_vmalloc(9)
• kho_alloc_preserve(9)
• kho_unpreserve_free(9)
• kho_restore_free(9)
• is_kho_boot(9)
• kho_retrieve_subtree(9)

like, the whole friend group is here 🧚💜

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okay that's the page!! this one's from the ./kernel/liveupdate source, dated October 2026 — go off, kernel girlies, see u in the next manpage 🎀✨💖