On Wed, Jul 31, 2024 at 09:22:32AM +0800, Huang, Ying wrote: > > > > This presumes driver configured devices, which is not always the case. > > > > kmem.c will set MEMTIER_DEFAULT_DAX_ADISTANCE > > > > but if BIOS/EFI has set up the node instead, you get the default of > > MEMTIER_ADISTANCE_DRAM if HMAT is not present or otherwise not sane. > > "efi_fake_mem=" kernel parameter can be used to add "EFI_MEMORY_SP" flag > to the memory range, so that kmem.c can manage it. > Worth noting: This feature was removed https://lore.kernel.org/all/20240620073205.1543145-1-ardb+git@xxxxxxxxxx/ So I cannot even use this to manage it. ~Gregory
