1 files changed, 21 insertions, 0 deletions

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 26d057a8b552..19262ac05dd2 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -229,6 +229,22 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
         return count;
 }
 
+static void reset_node_lowmem_managed_pages(pg_data_t *pgdat)
+{
+        struct zone *z;
+
+        /*
+         * In free_area_init_core(), highmem zone's managed_pages is set to
+         * present_pages, and bootmem allocator doesn't allocate from highmem
+         * zones. So there's no need to recalculate managed_pages because all
+         * highmem pages will be managed by the buddy system. Here highmem
+         * zone also includes highmem movable zone.
+         */
+        for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
+                if (!is_highmem(z))
+                        z->managed_pages = 0;
+}
+
 /**
  * free_all_bootmem_node - release a node's free pages to the buddy allocator
  * @pgdat: node to be released
@@ -238,6 +254,7 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
 {
         register_page_bootmem_info_node(pgdat);
+        reset_node_lowmem_managed_pages(pgdat);
         return free_all_bootmem_core(pgdat->bdata);
 }
 
@@ -250,6 +267,10 @@ unsigned long __init free_all_bootmem(void)
 {
         unsigned long total_pages = 0;
         bootmem_data_t *bdata;
+        struct pglist_data *pgdat;
+
+        for_each_online_pgdat(pgdat)
+                reset_node_lowmem_managed_pages(pgdat);
 
         list_for_each_entry(bdata, &bdata_list, list)
                 total_pages += free_all_bootmem_core(bdata);