lib/show_mem.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Generic show_mem() implementation
   4  *
   5  * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
   6  */
   7
   8 #include <linux/mm.h>
   9 #include <linux/cma.h>
  10
  11 void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
  12 {
  13         pg_data_t *pgdat;
  14         unsigned long total = 0, reserved = 0, highmem = 0;
  15
  16         printk("Mem-Info:\n");
  17         __show_free_areas(filter, nodemask, max_zone_idx);
  18
  19         for_each_online_pgdat(pgdat) {
  20                 int zoneid;
  21
  22                 for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
  23                         struct zone *zone = &pgdat->node_zones[zoneid];
  24                         if (!populated_zone(zone))
  25                                 continue;
  26
  27                         total += zone->present_pages;
  28                         reserved += zone->present_pages - zone_managed_pages(zone);
  29
  30                         if (is_highmem_idx(zoneid))
  31                                 highmem += zone->present_pages;
  32                 }
  33         }
  34
  35         printk("%lu pages RAM\n", total);
  36         printk("%lu pages HighMem/MovableOnly\n", highmem);
  37         printk("%lu pages reserved\n", reserved);
  38 #ifdef CONFIG_CMA
  39         printk("%lu pages cma reserved\n", totalcma_pages);
  40 #endif
  41 #ifdef CONFIG_MEMORY_FAILURE
  42         printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
  43 #endif
  44 }