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         unsigned long total = 0, reserved = 0, highmem = 0;
  14         struct zone *zone;
  15
  16         printk("Mem-Info:\n");
  17         __show_free_areas(filter, nodemask, max_zone_idx);
  18
  19         for_each_populated_zone(zone) {
  20
  21                 total += zone->present_pages;
  22                 reserved += zone->present_pages - zone_managed_pages(zone);
  23
  24                 if (is_highmem(zone))
  25                         highmem += zone->present_pages;
  26         }
  27
  28         printk("%lu pages RAM\n", total);
  29         printk("%lu pages HighMem/MovableOnly\n", highmem);
  30         printk("%lu pages reserved\n", reserved);
  31 #ifdef CONFIG_CMA
  32         printk("%lu pages cma reserved\n", totalcma_pages);
  33 #endif
  34 #ifdef CONFIG_MEMORY_FAILURE
  35         printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
  36 #endif
  37 }