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-rw-r--r--mm/page_alloc.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2dbdd98426fd..9b43511dbefd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -60,8 +60,11 @@ long nr_swap_pages;
* NORMAL allocation will leave 784M/256 of ram reserved in the ZONE_DMA
* HIGHMEM allocation will leave 224M/32 of ram reserved in ZONE_NORMAL
* HIGHMEM allocation will (224M+784M)/256 of ram reserved in ZONE_DMA
+ *
+ * TBD: should special case ZONE_DMA32 machines here - in those we normally
+ * don't need any ZONE_NORMAL reservation
*/
-int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { 256, 32 };
+int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { 256, 256, 32 };
EXPORT_SYMBOL(totalram_pages);
EXPORT_SYMBOL(nr_swap_pages);
@@ -73,7 +76,7 @@ EXPORT_SYMBOL(nr_swap_pages);
struct zone *zone_table[1 << ZONETABLE_SHIFT] __read_mostly;
EXPORT_SYMBOL(zone_table);
-static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };
+static char *zone_names[MAX_NR_ZONES] = { "DMA", "DMA32", "Normal", "HighMem" };
int min_free_kbytes = 1024;
unsigned long __initdata nr_kernel_pages;
@@ -1442,6 +1445,10 @@ static int __init build_zonelists_node(pg_data_t *pgdat, struct zonelist *zoneli
zone = pgdat->node_zones + ZONE_NORMAL;
if (zone->present_pages)
zonelist->zones[j++] = zone;
+ case ZONE_DMA32:
+ zone = pgdat->node_zones + ZONE_DMA32;
+ if (zone->present_pages)
+ zonelist->zones[j++] = zone;
case ZONE_DMA:
zone = pgdat->node_zones + ZONE_DMA;
if (zone->present_pages)
@@ -1456,6 +1463,8 @@ static inline int highest_zone(int zone_bits)
int res = ZONE_NORMAL;
if (zone_bits & (__force int)__GFP_HIGHMEM)
res = ZONE_HIGHMEM;
+ if (zone_bits & (__force int)__GFP_DMA32)
+ res = ZONE_DMA32;
if (zone_bits & (__force int)__GFP_DMA)
res = ZONE_DMA;
return res;
@@ -1976,7 +1985,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat,
if (zholes_size)
realsize -= zholes_size[j];
- if (j == ZONE_DMA || j == ZONE_NORMAL)
+ if (j < ZONE_HIGHMEM)
nr_kernel_pages += realsize;
nr_all_pages += realsize;