On 04/23/19 at 06:20am, Junichi Nomura wrote: > On 4/22/19 6:28 PM, Kairui Song wrote: > > The reason is the systab region is not mapped by the identity mapping > > provided by kexec. Currently kexec only create identity mapping for > > mem regions, wihch won't cover the systab. So second kernel will be > > accessing a not mapped memory region and cause fault. > > But as kexec tend to pad the map region up to PUD size, the > > systab could be included in the map by accident, so it worked on > > some machines, but that will be broken easily and unstable. > > Is the mapping of ACPI tables just by luck, too? Hmm, guess it should be mapped by luck, here is the range on the T420: da99f000 - dae9efff Reserved (efi systab fall in this region) daf9f000 - daffefff ACPI tables Thanks Dave _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
