mm: introduce new field "managed_pages" to struct zone

[karo-tx-linux.git] / mm / nobootmem.c

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index bd82f6b314114dc937bea707a70072b299860a08..b8294fc03df869153378f47f41f0ecd595c10887 100644 (file)
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -137,6 +137,22 @@ unsigned long __init free_low_memory_core_early(int nodeid)
        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
@@ -146,6 +162,7 @@ unsigned long __init free_low_memory_core_early(int nodeid)
 unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
 {
        register_page_bootmem_info_node(pgdat);
+       reset_node_lowmem_managed_pages(pgdat);
 
        /* free_low_memory_core_early(MAX_NUMNODES) will be called later */
        return 0;
@@ -158,6 +175,11 @@ unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
  */
 unsigned long __init free_all_bootmem(void)
 {
+       struct pglist_data *pgdat;
+
+       for_each_online_pgdat(pgdat)
+               reset_node_lowmem_managed_pages(pgdat);
+
        /*
         * We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id
         *  because in some case like Node0 doesn't have RAM installed