We _know_ which node pages in general belong to, at least at a very gross level in node_{start,end}_pfn[]. Use those to target the allocations of pages. Signed-off-by: Andy Whitcroft Signed-off-by: Dave Hansen --- arch/ia64/mm/numa.c | 0 memhotplug-dave/arch/i386/mm/discontig.c | 15 +++++++++++++++ memhotplug-dave/arch/ppc64/mm/numa.c | 19 +++++++++++++++++++ 3 files changed, 34 insertions(+) diff -puN arch/i386/mm/discontig.c~B-sparse-130-add-early_pfn_to_nid arch/i386/mm/discontig.c --- memhotplug/arch/i386/mm/discontig.c~B-sparse-130-add-early_pfn_to_nid 2005-03-11 10:52:17.000000000 -0800 +++ memhotplug-dave/arch/i386/mm/discontig.c 2005-03-11 10:52:17.000000000 -0800 @@ -148,6 +148,21 @@ static void __init find_max_pfn_node(int BUG(); } +/* Find the owning node for a pfn. */ +int early_pfn_to_nid(unsigned long pfn) +{ + int nid; + + for_each_node(nid) { + if (node_end_pfn[nid] == 0) + break; + if (node_start_pfn[nid] <= pfn && node_end_pfn[nid] >= pfn) + return nid; + } + + return 0; +} + /* * Allocate memory for the pg_data_t for this node via a crude pre-bootmem * method. For node zero take this from the bottom of memory, for diff -puN arch/ppc64/mm/numa.c~B-sparse-130-add-early_pfn_to_nid arch/ppc64/mm/numa.c --- memhotplug/arch/ppc64/mm/numa.c~B-sparse-130-add-early_pfn_to_nid 2005-03-11 10:52:17.000000000 -0800 +++ memhotplug-dave/arch/ppc64/mm/numa.c 2005-03-11 10:52:17.000000000 -0800 @@ -671,3 +671,22 @@ static int __init early_numa(char *p) return 0; } early_param("numa", early_numa); + +/* Find the owning node for a pfn. */ +int early_pfn_to_nid(unsigned long pfn) +{ + int nid; + unsigned long start, end; + + for_each_node(nid) { + if(!init_node_data[nid].node_spanned_pages) + break; + + start = init_node_data[nid].node_start_pfn; + end = start + init_node_data[nid].node_spanned_pages; + if (start <= pfn && pfn <= end) + return nid; + } + + return 0; +} diff -puN arch/ia64/mm/numa.c~B-sparse-130-add-early_pfn_to_nid arch/ia64/mm/numa.c _