On Tue, Sep 16, 2025 at 07:50:15PM -0700, Jason Miu wrote: > This series transitions KHO from an xarray-based metadata tracking > system with serialization to using page table like data structures > that can be passed directly to the next kernel. > > The key motivations for this change are to: > - Eliminate the need for data serialization before kexec. > - Remove the former KHO state machine by deprecating the finalize > and abort states. > - Pass preservation metadata more directly to the next kernel via the FDT. > > The new approach uses a per-order page table structure (kho_order_table, > kho_page_table, kho_bitmap_table) to mark preserved pages. The physical > address of the root `kho_order_table` is passed in the FDT, allowing the > next kernel to reconstruct the preserved memory map.
It is not a "page table" structure, it is just a radix tree with bits as the leaf. Jason
