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authorZhang Yanfei <zhangyanfei@cn.fujitsu.com>2013-07-08 15:59:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-09 10:33:20 -0700
commit7960aedde8cfa72e4caf488806ea7ea7d2fa8dba (patch)
tree1d565e1ae9f59f7dfedff57bb30afbaec251d669 /mm
parent609838cfed972d49a65aac7923a9ff5cbe482e30 (diff)
downloadop-kernel-dev-7960aedde8cfa72e4caf488806ea7ea7d2fa8dba.zip
op-kernel-dev-7960aedde8cfa72e4caf488806ea7ea7d2fa8dba.tar.gz
mm: remove duplicated call of get_pfn_range_for_nid
When calculating pages in a node, for each zone in that node, we will have zone_spanned_pages_in_node --> get_pfn_range_for_nid zone_absent_pages_in_node --> get_pfn_range_for_nid That is to say, we call the get_pfn_range_for_nid to get start_pfn and end_pfn of the node for MAX_NR_ZONES * 2 times. And this is totally unnecessary if we call the get_pfn_range_for_nid before zone_*_pages_in_node add two extra arguments node_start_pfn and node_end_pfn for zone_*_pages_in_node, then we can remove the get_pfn_range_in_node in zone_*_pages_in_node. [akpm@linux-foundation.org: make definitions more readable] Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c43
1 files changed, 32 insertions, 11 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 327516b..7d5e40f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4421,13 +4421,13 @@ static void __meminit adjust_zone_range_for_zone_movable(int nid,
*/
static unsigned long __meminit zone_spanned_pages_in_node(int nid,
unsigned long zone_type,
+ unsigned long node_start_pfn,
+ unsigned long node_end_pfn,
unsigned long *ignored)
{
- unsigned long node_start_pfn, node_end_pfn;
unsigned long zone_start_pfn, zone_end_pfn;
- /* Get the start and end of the node and zone */
- get_pfn_range_for_nid(nid, &node_start_pfn, &node_end_pfn);
+ /* Get the start and end of the zone */
zone_start_pfn = arch_zone_lowest_possible_pfn[zone_type];
zone_end_pfn = arch_zone_highest_possible_pfn[zone_type];
adjust_zone_range_for_zone_movable(nid, zone_type,
@@ -4482,14 +4482,14 @@ unsigned long __init absent_pages_in_range(unsigned long start_pfn,
/* Return the number of page frames in holes in a zone on a node */
static unsigned long __meminit zone_absent_pages_in_node(int nid,
unsigned long zone_type,
+ unsigned long node_start_pfn,
+ unsigned long node_end_pfn,
unsigned long *ignored)
{
unsigned long zone_low = arch_zone_lowest_possible_pfn[zone_type];
unsigned long zone_high = arch_zone_highest_possible_pfn[zone_type];
- unsigned long node_start_pfn, node_end_pfn;
unsigned long zone_start_pfn, zone_end_pfn;
- get_pfn_range_for_nid(nid, &node_start_pfn, &node_end_pfn);
zone_start_pfn = clamp(node_start_pfn, zone_low, zone_high);
zone_end_pfn = clamp(node_end_pfn, zone_low, zone_high);
@@ -4502,6 +4502,8 @@ static unsigned long __meminit zone_absent_pages_in_node(int nid,
#else /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
static inline unsigned long __meminit zone_spanned_pages_in_node(int nid,
unsigned long zone_type,
+ unsigned long node_start_pfn,
+ unsigned long node_end_pfn,
unsigned long *zones_size)
{
return zones_size[zone_type];
@@ -4509,6 +4511,8 @@ static inline unsigned long __meminit zone_spanned_pages_in_node(int nid,
static inline unsigned long __meminit zone_absent_pages_in_node(int nid,
unsigned long zone_type,
+ unsigned long node_start_pfn,
+ unsigned long node_end_pfn,
unsigned long *zholes_size)
{
if (!zholes_size)
@@ -4520,21 +4524,27 @@ static inline unsigned long __meminit zone_absent_pages_in_node(int nid,
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
static void __meminit calculate_node_totalpages(struct pglist_data *pgdat,
- unsigned long *zones_size, unsigned long *zholes_size)
+ unsigned long node_start_pfn,
+ unsigned long node_end_pfn,
+ unsigned long *zones_size,
+ unsigned long *zholes_size)
{
unsigned long realtotalpages, totalpages = 0;
enum zone_type i;
for (i = 0; i < MAX_NR_ZONES; i++)
totalpages += zone_spanned_pages_in_node(pgdat->node_id, i,
- zones_size);
+ node_start_pfn,
+ node_end_pfn,
+ zones_size);
pgdat->node_spanned_pages = totalpages;
realtotalpages = totalpages;
for (i = 0; i < MAX_NR_ZONES; i++)
realtotalpages -=
zone_absent_pages_in_node(pgdat->node_id, i,
- zholes_size);
+ node_start_pfn, node_end_pfn,
+ zholes_size);
pgdat->node_present_pages = realtotalpages;
printk(KERN_DEBUG "On node %d totalpages: %lu\n", pgdat->node_id,
realtotalpages);
@@ -4643,6 +4653,7 @@ static unsigned long __paginginit calc_memmap_size(unsigned long spanned_pages,
* NOTE: pgdat should get zeroed by caller.
*/
static void __paginginit free_area_init_core(struct pglist_data *pgdat,
+ unsigned long node_start_pfn, unsigned long node_end_pfn,
unsigned long *zones_size, unsigned long *zholes_size)
{
enum zone_type j;
@@ -4664,8 +4675,11 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
struct zone *zone = pgdat->node_zones + j;
unsigned long size, realsize, freesize, memmap_pages;
- size = zone_spanned_pages_in_node(nid, j, zones_size);
+ size = zone_spanned_pages_in_node(nid, j, node_start_pfn,
+ node_end_pfn, zones_size);
realsize = freesize = size - zone_absent_pages_in_node(nid, j,
+ node_start_pfn,
+ node_end_pfn,
zholes_size);
/*
@@ -4779,6 +4793,8 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
unsigned long node_start_pfn, unsigned long *zholes_size)
{
pg_data_t *pgdat = NODE_DATA(nid);
+ unsigned long start_pfn = 0;
+ unsigned long end_pfn = 0;
/* pg_data_t should be reset to zero when it's allocated */
WARN_ON(pgdat->nr_zones || pgdat->classzone_idx);
@@ -4786,7 +4802,11 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
init_zone_allows_reclaim(nid);
- calculate_node_totalpages(pgdat, zones_size, zholes_size);
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+ get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
+#endif
+ calculate_node_totalpages(pgdat, start_pfn, end_pfn,
+ zones_size, zholes_size);
alloc_node_mem_map(pgdat);
#ifdef CONFIG_FLAT_NODE_MEM_MAP
@@ -4795,7 +4815,8 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
(unsigned long)pgdat->node_mem_map);
#endif
- free_area_init_core(pgdat, zones_size, zholes_size);
+ free_area_init_core(pgdat, start_pfn, end_pfn,
+ zones_size, zholes_size);
}
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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