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 #include <linux/cma.h>
  12
  13 void show_mem(unsigned int filter)
  14 {
  15         pg_data_t *pgdat;
  16         unsigned long total = 0, reserved = 0, highmem = 0;
  17
  18         printk("Mem-Info:\n");
  19         show_free_areas(filter);
  20
  21         for_each_online_pgdat(pgdat) {
  22                 unsigned long flags;
  23                 int zoneid;
  24
  25                 pgdat_resize_lock(pgdat, &flags);
  26                 for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
  27                         struct zone *zone = &pgdat->node_zones[zoneid];
  28                         if (!populated_zone(zone))
  29                                 continue;
  30
  31                         total += zone->present_pages;
  32                         reserved += zone->present_pages - zone->managed_pages;
  33
  34                         if (is_highmem_idx(zoneid))
  35                                 highmem += zone->present_pages;
  36                 }
  37                 pgdat_resize_unlock(pgdat, &flags);
  38         }
  39
  40         printk("%lu pages RAM\n", total);
  41         printk("%lu pages HighMem/MovableOnly\n", highmem);
  42 #ifdef CONFIG_CMA
  43         printk("%lu pages reserved\n", (reserved - totalcma_pages));
  44         printk("%lu pages cma reserved\n", totalcma_pages);
  45 #else
  46         printk("%lu pages reserved\n", reserved);
  47 #endif
  48 #ifdef CONFIG_QUICKLIST
  49         printk("%lu pages in pagetable cache\n",
  50                 quicklist_total_size());
  51 #endif
  52 #ifdef CONFIG_MEMORY_FAILURE
  53         printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
  54 #endif
  55 }