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
show_mem(unsigned int filter)12 void show_mem(unsigned int filter)
13 {
14 pg_data_t *pgdat;
15 unsigned long total = 0, reserved = 0, shared = 0,
16 nonshared = 0, highmem = 0;
17
18 printk("Mem-Info:\n");
19 show_free_areas(filter);
20
21 if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
22 return;
23
24 for_each_online_pgdat(pgdat) {
25 unsigned long i, flags;
26
27 pgdat_resize_lock(pgdat, &flags);
28 for (i = 0; i < pgdat->node_spanned_pages; i++) {
29 struct page *page;
30 unsigned long pfn = pgdat->node_start_pfn + i;
31
32 if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
33 touch_nmi_watchdog();
34
35 if (!pfn_valid(pfn))
36 continue;
37
38 page = pfn_to_page(pfn);
39
40 if (PageHighMem(page))
41 highmem++;
42
43 if (PageReserved(page))
44 reserved++;
45 else if (page_count(page) == 1)
46 nonshared++;
47 else if (page_count(page) > 1)
48 shared += page_count(page) - 1;
49
50 total++;
51 }
52 pgdat_resize_unlock(pgdat, &flags);
53 }
54
55 printk("%lu pages RAM\n", total);
56 #ifdef CONFIG_HIGHMEM
57 printk("%lu pages HighMem\n", highmem);
58 #endif
59 printk("%lu pages reserved\n", reserved);
60 printk("%lu pages shared\n", shared);
61 printk("%lu pages non-shared\n", nonshared);
62 #ifdef CONFIG_QUICKLIST
63 printk("%lu pages in pagetable cache\n",
64 quicklist_total_size());
65 #endif
66 }
67