From: Dave Hansen There is a bug booting with CONFIG_NUMA=y, CONFIG_X86_GENERICARCH=y, and booting on a non-NUMA system. While not the most common configuration, it should surely be supported. memmap_init_zone() is the first user to do pfn_to_nid(), which relies on physnode_map[] to be done properly. memory_present() was supposed to do that, but never got called for the flat configuration, so pfn_to_nid() was returning -1 on valid pages. Signed-off-by: Andrew Morton --- 25-akpm/arch/i386/mm/discontig.c | 1 + 1 files changed, 1 insertion(+) diff -puN arch/i386/mm/discontig.c~x86-fix-booting-non-numa-system-with-numa-config arch/i386/mm/discontig.c --- 25/arch/i386/mm/discontig.c~x86-fix-booting-non-numa-system-with-numa-config Fri Mar 11 14:54:33 2005 +++ 25-akpm/arch/i386/mm/discontig.c Fri Mar 11 14:54:33 2005 @@ -121,6 +121,7 @@ int __init get_memcfg_numa_flat(void) find_max_pfn(); node_start_pfn[0] = 0; node_end_pfn[0] = max_pfn; + memory_present(0, 0, max_pfn); /* Indicate there is one node available. */ nodes_clear(node_online_map); _