Root/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
12void show_mem(unsigned int filter)
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);
19
20    if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
21        return;
22
23    for_each_online_pgdat(pgdat) {
24        unsigned long flags;
25        int zoneid;
26
27        pgdat_resize_lock(pgdat, &flags);
28        for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
29            struct zone *zone = &pgdat->node_zones[zoneid];
30            if (!populated_zone(zone))
31                continue;
32
33            total += zone->present_pages;
34            reserved = zone->present_pages - zone->managed_pages;
35
36            if (is_highmem_idx(zoneid))
37                highmem += zone->present_pages;
38        }
39        pgdat_resize_unlock(pgdat, &flags);
40    }
41
42    printk("%lu pages RAM\n", total);
43    printk("%lu pages HighMem/MovableOnly\n", highmem);
44    printk("%lu pages reserved\n", reserved);
45#ifdef CONFIG_QUICKLIST
46    printk("%lu pages in pagetable cache\n",
47        quicklist_total_size());
48#endif
49}
50

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