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authorLai Jiangshan <laijs@cn.fujitsu.com>2012-12-12 13:51:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 17:38:33 -0800
commit4b0ef1fe8a626f0ba7f649764f979d0dc9eab86b (patch)
treee66e7d6523ff4243755c13dce9c1fe6952991bba /mm/page_alloc.c
parent48fb2e240c4275c6ba4f53c9397f5fd6f350c3a7 (diff)
downloadlinux-4b0ef1fe8a626f0ba7f649764f979d0dc9eab86b.tar.gz
page_alloc: use N_MEMORY instead N_HIGH_MEMORY change the node_states initialization
N_HIGH_MEMORY stands for the nodes that has normal or high memory. N_MEMORY stands for the nodes that has any memory. The code here need to handle with the nodes which have memory, we should use N_MEMORY instead. Since we introduced N_MEMORY, we update the initialization of node_states. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: Christoph Lameter <cl@linux.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c40
1 files changed, 22 insertions, 18 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4171cd4f825..35727168896 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1695,7 +1695,7 @@ bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
*
* If the zonelist cache is present in the passed in zonelist, then
* returns a pointer to the allowed node mask (either the current
- * tasks mems_allowed, or node_states[N_HIGH_MEMORY].)
+ * tasks mems_allowed, or node_states[N_MEMORY].)
*
* If the zonelist cache is not available for this zonelist, does
* nothing and returns NULL.
@@ -1724,7 +1724,7 @@ static nodemask_t *zlc_setup(struct zonelist *zonelist, int alloc_flags)
allowednodes = !in_interrupt() && (alloc_flags & ALLOC_CPUSET) ?
&cpuset_current_mems_allowed :
- &node_states[N_HIGH_MEMORY];
+ &node_states[N_MEMORY];
return allowednodes;
}
@@ -3238,7 +3238,7 @@ static int find_next_best_node(int node, nodemask_t *used_node_mask)
return node;
}
- for_each_node_state(n, N_HIGH_MEMORY) {
+ for_each_node_state(n, N_MEMORY) {
/* Don't want a node to appear more than once */
if (node_isset(n, *used_node_mask))
@@ -3380,7 +3380,7 @@ static int default_zonelist_order(void)
* local memory, NODE_ORDER may be suitable.
*/
average_size = total_size /
- (nodes_weight(node_states[N_HIGH_MEMORY]) + 1);
+ (nodes_weight(node_states[N_MEMORY]) + 1);
for_each_online_node(nid) {
low_kmem_size = 0;
total_size = 0;
@@ -4731,7 +4731,7 @@ unsigned long __init find_min_pfn_with_active_regions(void)
/*
* early_calculate_totalpages()
* Sum pages in active regions for movable zone.
- * Populate N_HIGH_MEMORY for calculating usable_nodes.
+ * Populate N_MEMORY for calculating usable_nodes.
*/
static unsigned long __init early_calculate_totalpages(void)
{
@@ -4744,7 +4744,7 @@ static unsigned long __init early_calculate_totalpages(void)
totalpages += pages;
if (pages)
- node_set_state(nid, N_HIGH_MEMORY);
+ node_set_state(nid, N_MEMORY);
}
return totalpages;
}
@@ -4761,9 +4761,9 @@ static void __init find_zone_movable_pfns_for_nodes(void)
unsigned long usable_startpfn;
unsigned long kernelcore_node, kernelcore_remaining;
/* save the state before borrow the nodemask */
- nodemask_t saved_node_state = node_states[N_HIGH_MEMORY];
+ nodemask_t saved_node_state = node_states[N_MEMORY];
unsigned long totalpages = early_calculate_totalpages();
- int usable_nodes = nodes_weight(node_states[N_HIGH_MEMORY]);
+ int usable_nodes = nodes_weight(node_states[N_MEMORY]);
/*
* If movablecore was specified, calculate what size of
@@ -4798,7 +4798,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
restart:
/* Spread kernelcore memory as evenly as possible throughout nodes */
kernelcore_node = required_kernelcore / usable_nodes;
- for_each_node_state(nid, N_HIGH_MEMORY) {
+ for_each_node_state(nid, N_MEMORY) {
unsigned long start_pfn, end_pfn;
/*
@@ -4890,23 +4890,27 @@ restart:
out:
/* restore the node_state */
- node_states[N_HIGH_MEMORY] = saved_node_state;
+ node_states[N_MEMORY] = saved_node_state;
}
-/* Any regular memory on that node ? */
-static void __init check_for_regular_memory(pg_data_t *pgdat)
+/* Any regular or high memory on that node ? */
+static void check_for_memory(pg_data_t *pgdat, int nid)
{
-#ifdef CONFIG_HIGHMEM
enum zone_type zone_type;
- for (zone_type = 0; zone_type <= ZONE_NORMAL; zone_type++) {
+ if (N_MEMORY == N_NORMAL_MEMORY)
+ return;
+
+ for (zone_type = 0; zone_type <= ZONE_MOVABLE - 1; zone_type++) {
struct zone *zone = &pgdat->node_zones[zone_type];
if (zone->present_pages) {
- node_set_state(zone_to_nid(zone), N_NORMAL_MEMORY);
+ node_set_state(nid, N_HIGH_MEMORY);
+ if (N_NORMAL_MEMORY != N_HIGH_MEMORY &&
+ zone_type <= ZONE_NORMAL)
+ node_set_state(nid, N_NORMAL_MEMORY);
break;
}
}
-#endif
}
/**
@@ -4989,8 +4993,8 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
/* Any memory on that node */
if (pgdat->node_present_pages)
- node_set_state(nid, N_HIGH_MEMORY);
- check_for_regular_memory(pgdat);
+ node_set_state(nid, N_MEMORY);
+ check_for_memory(pgdat, nid);
}
}