85/*
86 * FLAT - support for basic PC memory model with discontig enabled, essentially
87 * a single node with all available processors in it with a flat
88 * memory map.
89 */
90int __init get_memcfg_numa_flat(void)
91{
92 printk("NUMA - single node, flat memory mode\n");
93
94 /* Run the memory configuration and find the top of memory. */
95 find_max_pfn();
96 node_start_pfn[0] = 0;
97 node_end_pfn[0] = max_pfn;
98
99 /* Indicate there is one node available. */
100 nodes_clear(node_online_map);
101 node_set_online(0);
102 return 1;
103}
不了解这个comments中FLAT指什么,看样子像是UMA且连续的。为什么又说“support for basic PC memory model with discontig enabled”。