From: Fan Du <fan.du@xxxxxxxxx> This is a hack to enumerate PMEM as NUMA nodes. It's necessary for current BIOS that don't yet fill ACPI HMAT table. WARNING: take care to backup. It is mutual exclusive with libnvdimm subsystem and can destroy ndctl managed namespaces. Signed-off-by: Fan Du <fan.du@xxxxxxxxx> Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx> --- arch/x86/kernel/e820.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- linux.orig/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800 +++ linux/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800 @@ -403,7 +403,8 @@ static int __init __append_e820_table(st /* Ignore the entry on 64-bit overflow: */ if (start > end && likely(size)) return -1; - + if (type == E820_TYPE_PMEM) + type = E820_TYPE_RAM; e820__range_add(start, size, type); entry++;
