On Fri, Jan 11, 2013 at 10:24 AM, Thomas Renninger <trenn at suse.de> wrote: >> We may need to keep exactmap intact. > Why? > Kexec/kdump should have been the only user? > If older/current kexec calls still add ACPI maps via memmap=X#Y, > they should already exist in the original e820 map and fall off or > get glued to one region if (wrongly) overlapping via sanitize_map. No, kexec/kdump is not the only user for memmap=exactmap. Thanks Yinghai