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> > void kho_free_preserved_memory(void *); > > This looks backwards to me. KHO should not deal with memory allocation, > it's responsibility to preserve/restore memory objects it supports. Then maybe those are luo_ helpers But having users open code __get_free_pages() and convert to/from struct page, phys, etc is not a great idea. The use case is simply to get some memory to preserve, it should work in terms of void *. We don't support slab today so this has to be emulated with full pages, but this detail should not leak out of the API. Jason