On 2015/2/4 6:40, Tony Luck wrote: >> Can't post this part yet because it uses things in an upcoming[*] ACPI, UEFI, or some >> other four-letter-ending-in-I standard. So just imagine a call someplace early >> in startup that reads information about mirrored address ranges and does: >> > Does the upcoming[*] ACPI will add a new flag in SRAT tables? just like memory hotplug. > > #define ACPI_SRAT_MEM_HOT_PLUGGABLE (1<<1) /* 01: Memory region is hot pluggable */ > +#define ACPI_SRAT_MEM_MIRROR (1<<3) /* 03: Memory region is mirrored */ The choice for this was UEFI - new attribute bit in the GetMemoryMap() return value. UEFI 2.5 has been published with this change and I posted a newer patch 10 days ago: https://lkml.org/lkml/2015/5/8/521 -Tony -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href