show_mem.c 1.39 KB
Newer Older
Johannes Weiner's avatar
Johannes Weiner committed
1
2
3
4
5
6
7
8
9
10
11
/*
 * Generic show_mem() implementation
 *
 * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
 * All code subject to the GPL version 2.
 */

#include <linux/mm.h>
#include <linux/nmi.h>
#include <linux/quicklist.h>

12
void show_mem(unsigned int filter)
Johannes Weiner's avatar
Johannes Weiner committed
13
14
15
16
17
{
	pg_data_t *pgdat;
	unsigned long total = 0, reserved = 0, shared = 0,
		nonshared = 0, highmem = 0;

18
	printk("Mem-Info:\n");
19
	show_free_areas(filter);
Johannes Weiner's avatar
Johannes Weiner committed
20

21
22
23
	if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
		return;

Johannes Weiner's avatar
Johannes Weiner committed
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
	for_each_online_pgdat(pgdat) {
		unsigned long i, flags;

		pgdat_resize_lock(pgdat, &flags);
		for (i = 0; i < pgdat->node_spanned_pages; i++) {
			struct page *page;
			unsigned long pfn = pgdat->node_start_pfn + i;

			if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
				touch_nmi_watchdog();

			if (!pfn_valid(pfn))
				continue;

			page = pfn_to_page(pfn);

			if (PageHighMem(page))
				highmem++;

			if (PageReserved(page))
				reserved++;
			else if (page_count(page) == 1)
				nonshared++;
			else if (page_count(page) > 1)
				shared += page_count(page) - 1;

			total++;
		}
		pgdat_resize_unlock(pgdat, &flags);
	}

55
	printk("%lu pages RAM\n", total);
Johannes Weiner's avatar
Johannes Weiner committed
56
#ifdef CONFIG_HIGHMEM
57
	printk("%lu pages HighMem\n", highmem);
Johannes Weiner's avatar
Johannes Weiner committed
58
#endif
59
60
61
	printk("%lu pages reserved\n", reserved);
	printk("%lu pages shared\n", shared);
	printk("%lu pages non-shared\n", nonshared);
Johannes Weiner's avatar
Johannes Weiner committed
62
#ifdef CONFIG_QUICKLIST
63
	printk("%lu pages in pagetable cache\n",
Johannes Weiner's avatar
Johannes Weiner committed
64
65
66
		quicklist_total_size());
#endif
}