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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>
This commit is contained in:
Lai Jiangshan 2012-12-12 13:51:46 -08:00 committed by Linus Torvalds
parent 48fb2e240c
commit 4b0ef1fe8a
2 changed files with 25 additions and 19 deletions
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4
arch/x86/mm/init_64.c
View File

@ -630,7 +630,9 @@ void __init paging_init(void)
* numa support is not compiled in, and later node_set_state
* will not set it back.
*/
node_clear_state(0, N_NORMAL_MEMORY);
node_clear_state(0, N_MEMORY);
if (N_MEMORY != N_NORMAL_MEMORY)
node_clear_state(0, N_NORMAL_MEMORY);
zone_sizes_init();
}

40
mm/page_alloc.c
View File

@ -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);
}
}