kho_unpreserve_free(9)

💅 kho_unpreserve_free(9)

okay so this is a page from the Kernel API Manual and it's literally about kho_unpreserve_free — the cleanup bestie of the KHO world 🧹✨

🌸 NAME 🌸

kho_unpreserve_free — unpreserve and free memory. that's it, that's the vibe 💖

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✨ SYNOPSIS ✨

void kho_unpreserve_free (void *mem );

no cap, that's the whole signature 🫶

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🎀 ARGUMENTS 🎀

• mem — a pointer to the memory that was allocated by kho_alloc_preserve. that's the only thing you hand it, and honestly she handles the rest 💅

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🔥 DESCRIPTION 🔥

so here's the tea ☕ — kho_unpreserve_free unregisters that memory from KHO preservation and frees the underlying pages back to the system. both. at once. main character energy fr fr 👑

the way that this is the function you call to clean up memory you allocated with kho_alloc_preserve — like, that's its whole purpose and she ate 🌈

lowkey important: this is the cleanup step, so don't just ghost your kho_alloc_preserve allocations, bestie 😭 call this and let the pages go home 🦋

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👑 SEE ALSO 👑

kernel file ./kernel/liveupdate/kexec_handover.c — go read it, iykyk 📖

and the whole friend group 💜:

• 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_unpreserve_pages(9)
• kho_preserve_vmalloc(9)
• kho_unpreserve_vmalloc(9)
• kho_restore_vmalloc(9)
• kho_alloc_preserve(9)
• kho_restore_free(9)
• is_kho_boot(9)
• kho_retrieve_subtree(9)

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okay that's the whole page bestie, go free some memory and slay 💅✨

source sitch: ./kernel/liveupdate · dated October 2026 · mwah, love u, bye 🎀