diff options
authorMel Gorman <>2006-11-23 12:01:41 +0000
committerLinus Torvalds <>2006-11-23 09:30:38 -0800
commit1abbfb412b1610ec3a7ec0164108cee01191d9f5 (patch)
parent0b1082efb92eedb28e982cfae526267ebdcf5622 (diff)
[PATCH] x86_64: fix bad page state in process 'swapper'
find_min_pfn_for_node() and find_min_pfn_with_active_regions() both depend on a sorted early_node_map[]. However, sort_node_map() is being called after fin_min_pfn_with_active_regions() in free_area_init_nodes(). In most cases, this is ok, but on at least one x86_64, the SRAT table caused the E820 ranges to be registered out of order. This gave the wrong values for the min PFN range resulting in some pages not being initialised. This patch sorts the early_node_map in find_min_pfn_for_node(). It has been boot tested on x86, x86_64, ppc64 and ia64. Signed-off-by: Mel Gorman <> Acked-by: Andre Noll <> Signed-off-by: Linus Torvalds <>
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bf2f6cff1d6a..aa6fcc7ca66f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2612,6 +2612,9 @@ unsigned long __init find_min_pfn_for_node(unsigned long nid)
int i;
+ /* Regions in the early_node_map can be in any order */
+ sort_node_map();
/* Assuming a sorted map, the first range found has the starting pfn */
for_each_active_range_index_in_nid(i, nid)
return early_node_map[i].start_pfn;
@@ -2680,9 +2683,6 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
max(max_zone_pfn[i], arch_zone_lowest_possible_pfn[i]);
- /* Regions in the early_node_map can be in any order */
- sort_node_map();
/* Print out the zone ranges */
printk("Zone PFN ranges:\n");
for (i = 0; i < MAX_NR_ZONES; i++)