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[PATCH] Fix zone policy determination

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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: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter 2006-01-06 00:11:18 -08:00 committed by Linus Torvalds
parent 4be38e351c
commit 02a68a5ebc
1 changed files with 7 additions and 3 deletions
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10
mm/page_alloc.c
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@ -1465,15 +1465,19 @@ static int __init build_zonelists_node(pg_data_t *pgdat,
struct zone *zone;
BUG_ON(k > ZONE_HIGHMEM);
for (zone = pgdat->node_zones + k; zone >= pgdat->node_zones; zone--) {
do {
zone = pgdat->node_zones + k;
if (populated_zone(zone)) {
#ifndef CONFIG_HIGHMEM
BUG_ON(zone - pgdat->node_zones > ZONE_NORMAL);
BUG_ON(k > ZONE_NORMAL);
#endif
zonelist->zones[j++] = zone;
check_highest_zone(k);
}
}
k--;
} while (k >= 0);
return j;
}