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Date: Thu, 14 May 2015 19:39:50 +0800
From: Gu Zheng <guz.fnst@...fujitsu.com>
To: <linux-mm@...ck.org>
CC: <linux-kernel@...r.kernel.org>, <akpm@...ux-foundation.org>,
<mgorman@...e.de>
Subject: [PATCH] mm/memory hotplug: init the zones' size when calculate node totalpages
Init the zones' size when calculate node totalpages to avoid duplicated
operations in free_area_init_core.
Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
---
mm/page_alloc.c | 44 +++++++++++++++++++++-----------------------
1 files changed, 21 insertions(+), 23 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ebffa0e..0b34aec 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4769,22 +4769,28 @@ static void __meminit calculate_node_totalpages(struct pglist_data *pgdat,
unsigned long *zones_size,
unsigned long *zholes_size)
{
- unsigned long realtotalpages, totalpages = 0;
+ unsigned long realtotalpages = 0, totalpages = 0;
enum zone_type i;
- for (i = 0; i < MAX_NR_ZONES; i++)
- totalpages += zone_spanned_pages_in_node(pgdat->node_id, i,
- node_start_pfn,
- node_end_pfn,
- zones_size);
- pgdat->node_spanned_pages = totalpages;
+ for (i = 0; i < MAX_NR_ZONES; i++) {
+ struct zone *zone = pgdat->node_zones + i;
+ unsigned long size, real_size;
- realtotalpages = totalpages;
- for (i = 0; i < MAX_NR_ZONES; i++)
- realtotalpages -=
- zone_absent_pages_in_node(pgdat->node_id, i,
+ size = zone_spanned_pages_in_node(pgdat->node_id, i,
+ node_start_pfn,
+ node_end_pfn,
+ zones_size);
+ real_size = size - zone_absent_pages_in_node(pgdat->node_id, i,
node_start_pfn, node_end_pfn,
zholes_size);
+ zone->spanned_pages = size;
+ zone->present_pages = real_size;
+
+ totalpages += size;
+ realtotalpages += real_size;
+ }
+
+ pgdat->node_spanned_pages = totalpages;
pgdat->node_present_pages = realtotalpages;
printk(KERN_DEBUG "On node %d totalpages: %lu\n", pgdat->node_id,
realtotalpages);
@@ -4894,8 +4900,7 @@ 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)
+ unsigned long node_start_pfn, unsigned long node_end_pfn)
{
enum zone_type j;
int nid = pgdat->node_id;
@@ -4916,12 +4921,8 @@ 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, 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);
+ size = zone->spanned_pages;
+ realsize = freesize = zone->present_pages;
/*
* Adjust freesize so that it accounts for how much memory
@@ -4956,8 +4957,6 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
nr_kernel_pages -= memmap_pages;
nr_all_pages += freesize;
- zone->spanned_pages = size;
- zone->present_pages = realsize;
/*
* Set an approximate value for lowmem here, it will be adjusted
* when the bootmem allocator frees pages into the buddy system.
@@ -5063,8 +5062,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
(unsigned long)pgdat->node_mem_map);
#endif
- free_area_init_core(pgdat, start_pfn, end_pfn,
- zones_size, zholes_size);
+ free_area_init_core(pgdat, start_pfn, end_pfn);
}
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
--
1.7.7
--
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