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
12 void show_mem(void)
13 {
14 pg_data_t *pgdat;
15 unsigned long total = 0, reserved = 0, shared = 0,
16 nonshared = 0, highmem = 0;
17
18 printk(KERN_INFO "Mem-Info:\n");
19 show_free_areas();
20
21 for_each_online_pgdat(pgdat) {
22 unsigned long i, flags;
23
24 pgdat_resize_lock(pgdat, &flags);
25 for (i = 0; i < pgdat->node_spanned_pages; i++) {
26 struct page *page;
27 unsigned long pfn = pgdat->node_start_pfn + i;
28
29 if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
30 touch_nmi_watchdog();
31
32 if (!pfn_valid(pfn))
33 continue;
34
35 page = pfn_to_page(pfn);
36
37 if (PageHighMem(page))
38 highmem++;
39
40 if (PageReserved(page))
41 reserved++;
42 else if (page_count(page) == 1)
43 nonshared++;
44 else if (page_count(page) > 1)
45 shared += page_count(page) - 1;
46
47 total++;
48 }
49 pgdat_resize_unlock(pgdat, &flags);
50 }
51
52 printk(KERN_INFO "%lu pages RAM\n", total);
53 #ifdef CONFIG_HIGHMEM
54 printk(KERN_INFO "%lu pages HighMem\n", highmem);
55 #endif
56 printk(KERN_INFO "%lu pages reserved\n", reserved);
57 printk(KERN_INFO "%lu pages shared\n", shared);
58 printk(KERN_INFO "%lu pages non-shared\n", nonshared);
59 #ifdef CONFIG_QUICKLIST
60 printk(KERN_INFO "%lu pages in pagetable cache\n",
61 quicklist_total_size());
62 #endif
63 }
64
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