On Mon, Oct 20, 2025 at 5:09 PM Pasha Tatashin <[email protected]> wrote: > > KHO memory preservation metadata is preserved in 512 byte chunks which > requires their allocation from slab allocator. Slabs are not safe to be > used with KHO because of kfence, and because partial slabs may lead > leaks to the next kernel. Change the size to be PAGE_SIZE.
> -#define PRESERVE_BITS (512 * 8) > +#define PRESERVE_BITS (PAGE_SIZE * 8) nit: A comment somewhere (maybe here?) about the requirement that KHO metadata are not stored on slabs would be helpful to avoid someone "optimizing" this back to 512 in the future.
