lib/show_mem.c

   1 /*
   2  * Generic show_mem() implementation
   3  *
   4  * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
   5  * All code subject to the GPL version 2.
   6  */
   7
   8 #include <linux/mm.h>
   9 #include <linux/nmi.h>
  10 #include <linux/quicklist.h>
  11
  12 void show_mem(unsigned int filter)
  13 {
  14         pg_data_t *pgdat;
  15         unsigned long total = 0, reserved = 0, highmem = 0;
  16
  17         printk("Mem-Info:\n");
  18         show_free_areas(filter);
  19
  20         if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
  21                 return;
  22
  23         for_each_online_pgdat(pgdat) {
  24                 unsigned long flags;
  25                 int zoneid;
  26
  27                 pgdat_resize_lock(pgdat, &flags);
  28                 for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
  29                         struct zone *zone = &pgdat->node_zones[zoneid];
  30                         if (!populated_zone(zone))
  31                                 continue;
  32
  33                         total += zone->present_pages;
  34                         reserved = zone->present_pages - zone->managed_pages;
  35
  36                         if (is_highmem_idx(zoneid))
  37                                 highmem += zone->present_pages;
  38                 }
  39                 pgdat_resize_unlock(pgdat, &flags);
  40         }
  41
  42         printk("%lu pages RAM\n", total);
  43         printk("%lu pages HighMem/MovableOnly\n", highmem);
  44         printk("%lu pages reserved\n", reserved);
  45 #ifdef CONFIG_QUICKLIST
  46         printk("%lu pages in pagetable cache\n",
  47                 quicklist_total_size());
  48 #endif
  49 }