the-tree/lib/show_mem.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Generic show_mem() implementation
0004  *
0005  * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
0006  */
0007
0008 #include <linux/mm.h>
0009 #include <linux/cma.h>
0010
0011 void show_mem(unsigned int filter, nodemask_t *nodemask)
0012 {
0013     pg_data_t *pgdat;
0014     unsigned long total = 0, reserved = 0, highmem = 0;
0015
0016     printk("Mem-Info:\n");
0017     show_free_areas(filter, nodemask);
0018
0019     for_each_online_pgdat(pgdat) {
0020         int zoneid;
0021
0022         for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
0023             struct zone *zone = &pgdat->node_zones[zoneid];
0024             if (!populated_zone(zone))
0025                 continue;
0026
0027             total += zone->present_pages;
0028             reserved += zone->present_pages - zone_managed_pages(zone);
0029
0030             if (is_highmem_idx(zoneid))
0031                 highmem += zone->present_pages;
0032         }
0033     }
0034
0035     printk("%lu pages RAM\n", total);
0036     printk("%lu pages HighMem/MovableOnly\n", highmem);
0037     printk("%lu pages reserved\n", reserved);
0038 #ifdef CONFIG_CMA
0039     printk("%lu pages cma reserved\n", totalcma_pages);
0040 #endif
0041 #ifdef CONFIG_MEMORY_FAILURE
0042     printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
0043 #endif
0044 }