1#include <linux/fs.h>
2#include <linux/hugetlb.h>
3#include <linux/init.h>
4#include <linux/kernel.h>
5#include <linux/mm.h>
6#include <linux/mman.h>
7#include <linux/mmzone.h>
8#include <linux/proc_fs.h>
9#include <linux/quicklist.h>
10#include <linux/seq_file.h>
11#include <linux/swap.h>
12#include <linux/vmstat.h>
13#include <asm/atomic.h>
14#include <asm/page.h>
15#include <asm/pgtable.h>
16#include "internal.h"
17
18void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
19{
20}
21
22static int meminfo_proc_show(struct seq_file *m, void *v)
23{
24	struct sysinfo i;
25	unsigned long committed;
26	unsigned long allowed;
27	struct vmalloc_info vmi;
28	long cached;
29	unsigned long pages[NR_LRU_LISTS];
30	int lru;
31
32/*
33 * display in kilobytes.
34 */
35#define K(x) ((x) << (PAGE_SHIFT - 10))
36	si_meminfo(&i);
37	si_swapinfo(&i);
38	committed = percpu_counter_read_positive(&vm_committed_as);
39	allowed = ((totalram_pages - hugetlb_total_pages())
40		* sysctl_overcommit_ratio / 100) + total_swap_pages;
41
42	cached = global_page_state(NR_FILE_PAGES) -
43			total_swapcache_pages - i.bufferram;
44	if (cached < 0)
45		cached = 0;
46
47	get_vmalloc_info(&vmi);
48
49	for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
50		pages[lru] = global_page_state(NR_LRU_BASE + lru);
51
52	/*
53	 * Tagged format, for easy grepping and expansion.
54	 */
55	seq_printf(m,
56		"MemTotal:       %8lu kB\n"
57		"MemFree:        %8lu kB\n"
58		"Buffers:        %8lu kB\n"
59		"Cached:         %8lu kB\n"
60		"SwapCached:     %8lu kB\n"
61		"Active:         %8lu kB\n"
62		"Inactive:       %8lu kB\n"
63		"Active(anon):   %8lu kB\n"
64		"Inactive(anon): %8lu kB\n"
65		"Active(file):   %8lu kB\n"
66		"Inactive(file): %8lu kB\n"
67		"Unevictable:    %8lu kB\n"
68		"Mlocked:        %8lu kB\n"
69#ifdef CONFIG_HIGHMEM
70		"HighTotal:      %8lu kB\n"
71		"HighFree:       %8lu kB\n"
72		"LowTotal:       %8lu kB\n"
73		"LowFree:        %8lu kB\n"
74#endif
75#ifndef CONFIG_MMU
76		"MmapCopy:       %8lu kB\n"
77#endif
78		"SwapTotal:      %8lu kB\n"
79		"SwapFree:       %8lu kB\n"
80		"Dirty:          %8lu kB\n"
81		"Writeback:      %8lu kB\n"
82		"AnonPages:      %8lu kB\n"
83		"Mapped:         %8lu kB\n"
84		"Shmem:          %8lu kB\n"
85		"Slab:           %8lu kB\n"
86		"SReclaimable:   %8lu kB\n"
87		"SUnreclaim:     %8lu kB\n"
88		"KernelStack:    %8lu kB\n"
89		"PageTables:     %8lu kB\n"
90#ifdef CONFIG_QUICKLIST
91		"Quicklists:     %8lu kB\n"
92#endif
93		"NFS_Unstable:   %8lu kB\n"
94		"Bounce:         %8lu kB\n"
95		"WritebackTmp:   %8lu kB\n"
96		"CommitLimit:    %8lu kB\n"
97		"Committed_AS:   %8lu kB\n"
98		"VmallocTotal:   %8lu kB\n"
99		"VmallocUsed:    %8lu kB\n"
100		"VmallocChunk:   %8lu kB\n"
101#ifdef CONFIG_MEMORY_FAILURE
102		"HardwareCorrupted: %5lu kB\n"
103#endif
104		,
105		K(i.totalram),
106		K(i.freeram),
107		K(i.bufferram),
108		K(cached),
109		K(total_swapcache_pages),
110		K(pages[LRU_ACTIVE_ANON]   + pages[LRU_ACTIVE_FILE]),
111		K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
112		K(pages[LRU_ACTIVE_ANON]),
113		K(pages[LRU_INACTIVE_ANON]),
114		K(pages[LRU_ACTIVE_FILE]),
115		K(pages[LRU_INACTIVE_FILE]),
116		K(pages[LRU_UNEVICTABLE]),
117		K(global_page_state(NR_MLOCK)),
118#ifdef CONFIG_HIGHMEM
119		K(i.totalhigh),
120		K(i.freehigh),
121		K(i.totalram-i.totalhigh),
122		K(i.freeram-i.freehigh),
123#endif
124#ifndef CONFIG_MMU
125		K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
126#endif
127		K(i.totalswap),
128		K(i.freeswap),
129		K(global_page_state(NR_FILE_DIRTY)),
130		K(global_page_state(NR_WRITEBACK)),
131		K(global_page_state(NR_ANON_PAGES)),
132		K(global_page_state(NR_FILE_MAPPED)),
133		K(global_page_state(NR_SHMEM)),
134		K(global_page_state(NR_SLAB_RECLAIMABLE) +
135				global_page_state(NR_SLAB_UNRECLAIMABLE)),
136		K(global_page_state(NR_SLAB_RECLAIMABLE)),
137		K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
138		global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
139		K(global_page_state(NR_PAGETABLE)),
140#ifdef CONFIG_QUICKLIST
141		K(quicklist_total_size()),
142#endif
143		K(global_page_state(NR_UNSTABLE_NFS)),
144		K(global_page_state(NR_BOUNCE)),
145		K(global_page_state(NR_WRITEBACK_TEMP)),
146		K(allowed),
147		K(committed),
148		(unsigned long)VMALLOC_TOTAL >> 10,
149		vmi.used >> 10,
150		vmi.largest_chunk >> 10
151#ifdef CONFIG_MEMORY_FAILURE
152		,atomic_long_read(&mce_bad_pages) << (PAGE_SHIFT - 10)
153#endif
154		);
155
156	hugetlb_report_meminfo(m);
157
158	arch_report_meminfo(m);
159
160	return 0;
161#undef K
162}
163
164static int meminfo_proc_open(struct inode *inode, struct file *file)
165{
166	return single_open(file, meminfo_proc_show, NULL);
167}
168
169static const struct file_operations meminfo_proc_fops = {
170	.open		= meminfo_proc_open,
171	.read		= seq_read,
172	.llseek		= seq_lseek,
173	.release	= single_release,
174};
175
176static int __init proc_meminfo_init(void)
177{
178	proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
179	return 0;
180}
181module_init(proc_meminfo_init);
182