KHO SERIALIZATION BLOCKS(9)

💖 KHO Serialization Blocks 💖

okay bestie, welcome to the Kernel API Manual entry for KHO serialization blocks 💅

so KHO is literally the mechanism that preserves stateful data across a kexec handover by serializing it into memory blocks — and it also gives you the common infrastructure for managing those blocks. no cap, that's the vibe ✨

Each block is made of a header (struct kho_block_header_ser) followed by an array of serialized entries. Multiple blocks get linked together through a physical pointer in the header, forming a linked list that can be traversed easily in both the current kernel and the next kernel. it's giving “handover but make it a data structure” 🦋

✨ SEE ALSO ✨

Kernel file: ./kernel/liveupdate/kho_block.c — and these are the related besties:

• kho_block_set_init(9)
• kho_block_set_grow(9)
• kho_block_set_shrink(9)
• kho_block_set_restore(9)
• kho_block_set_destroy(9)
• kho_block_set_clear(9)
• kho_block_set_it_init(9)
• kho_block_set_it_reserve_entry(9)
• kho_block_set_it_read_entry(9)
• kho_block_set_it_prev(9)

mwah 💋 that's the page, bestie — source/version: ./kernel/liveupdate, date: October 2026. it's KHO Serialization Blocks(9) from the Kernel API Manual, and yes, she ate 🫶