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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("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("%lu pages RAM\n", total); |
53 | #ifdef CONFIG_HIGHMEM |
54 | printk("%lu pages HighMem\n", highmem); |
55 | #endif |
56 | printk("%lu pages reserved\n", reserved); |
57 | printk("%lu pages shared\n", shared); |
58 | printk("%lu pages non-shared\n", nonshared); |
59 | #ifdef CONFIG_QUICKLIST |
60 | printk("%lu pages in pagetable cache\n", |
61 | quicklist_total_size()); |
62 | #endif |
63 | } |
64 |
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