mm: use zone->present_pages instead of zone->managed_pages where appropriate

Now we have zone->managed_pages for "pages managed by the buddy system
in the zone", so replace zone->present_pages with zone->managed_pages if
what the user really wants is number of allocatable pages.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Chris Clayton <chris2553@googlemail.com>
Cc: "Rafael J . Wysocki" <rjw@sisk.pl>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan@kernel.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 16 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a7381be21320..5f73106bd8dd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2808,7 +2808,7 @@ static unsigned int nr_free_zone_pages(int offset)
         struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL);
 
         for_each_zone_zonelist(zone, z, zonelist, offset) {
-                unsigned long size = zone->present_pages;
+                unsigned long size = zone->managed_pages;
                 unsigned long high = high_wmark_pages(zone);
                 if (size > high)
                         sum += size - high;
@@ -2861,7 +2861,7 @@ void si_meminfo_node(struct sysinfo *val, int nid)
         val->totalram = pgdat->node_present_pages;
         val->freeram = node_page_state(nid, NR_FREE_PAGES);
 #ifdef CONFIG_HIGHMEM
-        val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].present_pages;
+        val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].managed_pages;
         val->freehigh = zone_page_state(&pgdat->node_zones[ZONE_HIGHMEM],
                         NR_FREE_PAGES);
 #else
@@ -3939,7 +3939,7 @@ static int __meminit zone_batchsize(struct zone *zone)
          *
          * OK, so we don't know how big the cache is.  So guess.
          */
-        batch = zone->present_pages / 1024;
+        batch = zone->managed_pages / 1024;
         if (batch * PAGE_SIZE > 512 * 1024)
                 batch = (512 * 1024) / PAGE_SIZE;
         batch /= 4;             /* We effectively *= 4 below */
@@ -4023,7 +4023,7 @@ static void __meminit setup_zone_pageset(struct zone *zone)
 
                 if (percpu_pagelist_fraction)
                         setup_pagelist_highmark(pcp,
-                                (zone->present_pages /
+                                (zone->managed_pages /
                                         percpu_pagelist_fraction));
         }
 }
@@ -5435,8 +5435,8 @@ static void calculate_totalreserve_pages(void)
                         /* we treat the high watermark as reserved pages. */
                         max += high_wmark_pages(zone);
 
-                        if (max > zone->present_pages)
-                                max = zone->present_pages;
+                        if (max > zone->managed_pages)
+                                max = zone->managed_pages;
                         reserve_pages += max;
                         /*
                          * Lowmem reserves are not available to
@@ -5468,7 +5468,7 @@ static void setup_per_zone_lowmem_reserve(void)
         for_each_online_pgdat(pgdat) {
                 for (j = 0; j < MAX_NR_ZONES; j++) {
                         struct zone *zone = pgdat->node_zones + j;
-                        unsigned long present_pages = zone->present_pages;
+                        unsigned long managed_pages = zone->managed_pages;
 
                         zone->lowmem_reserve[j] = 0;
 
@@ -5482,9 +5482,9 @@ static void setup_per_zone_lowmem_reserve(void)
                                         sysctl_lowmem_reserve_ratio[idx] = 1;
 
                                 lower_zone = pgdat->node_zones + idx;
-                                lower_zone->lowmem_reserve[j] = present_pages /
+                                lower_zone->lowmem_reserve[j] = managed_pages /
                                         sysctl_lowmem_reserve_ratio[idx];
-                                present_pages += lower_zone->present_pages;
+                                managed_pages += lower_zone->managed_pages;
                         }
                 }
         }
@@ -5503,14 +5503,14 @@ static void __setup_per_zone_wmarks(void)
         /* Calculate total number of !ZONE_HIGHMEM pages */
         for_each_zone(zone) {
                 if (!is_highmem(zone))
-                        lowmem_pages += zone->present_pages;
+                        lowmem_pages += zone->managed_pages;
         }
 
         for_each_zone(zone) {
                 u64 tmp;
 
                 spin_lock_irqsave(&zone->lock, flags);
-                tmp = (u64)pages_min * zone->present_pages;
+                tmp = (u64)pages_min * zone->managed_pages;
                 do_div(tmp, lowmem_pages);
                 if (is_highmem(zone)) {
                         /*
@@ -5524,7 +5524,7 @@ static void __setup_per_zone_wmarks(void)
                          */
                         unsigned long min_pages;
 
-                        min_pages = zone->present_pages / 1024;
+                        min_pages = zone->managed_pages / 1024;
                         min_pages = clamp(min_pages, SWAP_CLUSTER_MAX, 128UL);
                         zone->watermark[WMARK_MIN] = min_pages;
                 } else {
@@ -5586,7 +5586,7 @@ static void __meminit calculate_zone_inactive_ratio(struct zone *zone)
         unsigned int gb, ratio;
 
         /* Zone size in gigabytes */
-        gb = zone->present_pages >> (30 - PAGE_SHIFT);
+        gb = zone->managed_pages >> (30 - PAGE_SHIFT);
         if (gb)
                 ratio = int_sqrt(10 * gb);
         else
@@ -5672,7 +5672,7 @@ int sysctl_min_unmapped_ratio_sysctl_handler(ctl_table *table, int write,
                 return rc;
 
         for_each_zone(zone)
-                zone->min_unmapped_pages = (zone->present_pages *
+                zone->min_unmapped_pages = (zone->managed_pages *
                                 sysctl_min_unmapped_ratio) / 100;
         return 0;
 }
@@ -5688,7 +5688,7 @@ int sysctl_min_slab_ratio_sysctl_handler(ctl_table *table, int write,
                 return rc;
 
         for_each_zone(zone)
-                zone->min_slab_pages = (zone->present_pages *
+                zone->min_slab_pages = (zone->managed_pages *
                                 sysctl_min_slab_ratio) / 100;
         return 0;
 }
@@ -5730,7 +5730,7 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
         for_each_populated_zone(zone) {
                 for_each_possible_cpu(cpu) {
                         unsigned long  high;
-                        high = zone->present_pages / percpu_pagelist_fraction;
+                        high = zone->managed_pages / percpu_pagelist_fraction;
                         setup_pagelist_highmark(
                                 per_cpu_ptr(zone->pageset, cpu), high);
                 }