Commit 02a68a5e authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
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[PATCH] Fix zone policy determination

The use k in the inner loop means that the highest zone nr is always used
if any zone of a node is populated.  This means that the policy zone is not
correctly determined on arches that do no use HIGHMEM like ia64.

Change the loop to decrement k which also simplifies the BUG_ON.

Signed-off-by: default avatarChristoph Lameter <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 4be38e35
......@@ -1465,15 +1465,19 @@ static int __init build_zonelists_node(pg_data_t *pgdat,
struct zone *zone;
for (zone = pgdat->node_zones + k; zone >= pgdat->node_zones; zone--) {
do {
zone = pgdat->node_zones + k;
if (populated_zone(zone)) {
BUG_ON(zone - pgdat->node_zones > ZONE_NORMAL);
zonelist->zones[j++] = zone;
} while (k >= 0);
return j;
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