Subject: + mm-remove-duplicated-call-of-get_pfn_range_for_nid.patch added to -mm tree
To: zhangyanfei@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 28 May 2013 14:04:09 -0700
The patch titled
Subject: mm: remove duplicated call to get_pfn_range_for_nid()
has been added to the -mm tree. Its filename is
mm-remove-duplicated-call-of-get_pfn_range_for_nid.patch
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------------------------------------------------------
From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Subject: mm: remove duplicated call to 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 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 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.
Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 40 +++++++++++++++++++++++++++++-----------
1 file changed, 29 insertions(+), 11 deletions(-)
diff -puN mm/page_alloc.c~mm-remove-duplicated-call-of-get_pfn_range_for_nid mm/page_alloc.c
--- a/mm/page_alloc.c~mm-remove-duplicated-call-of-get_pfn_range_for_nid
+++ a/mm/page_alloc.c
@@ -4418,13 +4418,13 @@ static void __meminit adjust_zone_range_
*/
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,
@@ -4479,14 +4479,14 @@ unsigned long __init absent_pages_in_ran
/* 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);
@@ -4499,6 +4499,8 @@ static unsigned long __meminit zone_abse
#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];
@@ -4506,6 +4508,8 @@ static inline unsigned long __meminit zo
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)
@@ -4517,21 +4521,27 @@ static inline unsigned long __meminit zo
#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);
@@ -4640,6 +4650,7 @@ static unsigned long __paginginit calc_m
* 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;
@@ -4661,8 +4672,11 @@ static void __paginginit free_area_init_
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);
/*
@@ -4776,6 +4790,7 @@ void __paginginit free_area_init_node(in
unsigned long node_start_pfn, unsigned long *zholes_size)
{
pg_data_t *pgdat = NODE_DATA(nid);
+ unsigned long start_pfn, end_pfn;
/* pg_data_t should be reset to zero when it's allocated */
WARN_ON(pgdat->nr_zones || pgdat->classzone_idx);
@@ -4783,7 +4798,9 @@ void __paginginit free_area_init_node(in
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
init_zone_allows_reclaim(nid);
- calculate_node_totalpages(pgdat, zones_size, zholes_size);
+ get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
+ calculate_node_totalpages(pgdat, start_pfn, end_pfn,
+ zones_size, zholes_size);
alloc_node_mem_map(pgdat);
#ifdef CONFIG_FLAT_NODE_MEM_MAP
@@ -4792,7 +4809,8 @@ void __paginginit free_area_init_node(in
(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
_
Patches currently in -mm which might be from zhangyanfei@xxxxxxxxxxxxxx are
ipvs-change-type-of-netns_ipvs-sysctl_sync_qlen_max.patch
vmcore-clean-up-read_vmcore.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment-fix.patch
vmcore-treat-memory-chunks-referenced-by-pt_load-program-header-entries-in-page-size-boundary-in-vmcore_list.patch
vmalloc-make-find_vm_area-check-in-range.patch
vmalloc-introduce-remap_vmalloc_range_partial.patch
vmalloc-introduce-remap_vmalloc_range_partial-fix.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory-fix.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer-fix.patch
vmcore-calculate-vmcore-file-size-from-buffer-size-and-total-size-of-vmcore-objects.patch
vmcore-support-mmap-on-proc-vmcore.patch
vmcore-support-mmap-on-proc-vmcore-fix.patch
mm-remove-duplicated-call-of-get_pfn_range_for_nid.patch
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