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/quicklist.h>
  10 #include <linux/cma.h>
  11
  12 void show_mem(unsigned int filter, nodemask_t *nodemask)
  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, nodemask);
  19
  20         for_each_online_pgdat(pgdat) {
  21                 int zoneid;
  22
  23                 for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
  24                         struct zone *zone = &pgdat->node_zones[zoneid];
  25                         if (!populated_zone(zone))
  26                                 continue;
  27
  28                         total += zone->present_pages;
  29                         reserved += zone->present_pages - zone_managed_pages(zone);
  30
  31                         if (is_highmem_idx(zoneid))
  32                                 highmem += zone->present_pages;
  33                 }
  34         }
  35
  36         printk("%lu pages RAM\n", total);
  37         printk("%lu pages HighMem/MovableOnly\n", highmem);
  38         printk("%lu pages reserved\n", reserved);
  39 #ifdef CONFIG_CMA
  40         printk("%lu pages cma reserved\n", totalcma_pages);
  41 #endif
  42 #ifdef CONFIG_QUICKLIST
  43         printk("%lu pages in pagetable cache\n",
  44                 quicklist_total_size());
  45 #endif
  46 #ifdef CONFIG_MEMORY_FAILURE
  47         printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
  48 #endif
  49 }