On Wed, Nov 25, 2015 at 2:52 AM, Elliott, Robert (Persistent Memory) <elli...@hpe.com> wrote: > We've noticed that some combinations of grub and old linux kernels > > end up interpreting the UEFI memory map EfiPersistentMemory type 14 > > (formerly a reserved value) as regular memory in the linux e820 > > table, causing silent data corruption on the NVDIMMs. That occurs > > even though grub prints this message suggesting everything is safe: > > Unknown memory type 14, considering reserved > > > > In broken versions of grub, the code parsing the UEFI memory map > > has a "default" case that falls through to the > > GRUB_EFI_BOOT_SERVICES_DATA case,
This is fallout of 9be4c45dbe3c877d1f4856e99ee15133c6cd2261; thank you for report! > which marks the memory range > > as GRUB_MEMORY_AVAILABLE and ends up in e820 as regular memory. > According to EFI spec, EfiPersistentMemory is "A memory region that operates as EfiConventionalMemory". Why it should be treated differently? _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
