> What's the relationship between e820 map and SRAT? The e820 map (or EFI memory map on some recent systems) provides a list of memory ranges together with usage information (e.g. reserved for BIOS, or available) and attributes (WB cacheable, uncacheable). The SRAT table provides topology information for address ranges. It tells the OS which memory is close to each cpu, and which is more distant. If there are multiple degrees of "distant" then the SLIT table provides a matrix of relative latencies between nodes. -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