blob: 43d23948384addca6930aa65acbf49804226827f [file] [log] [blame]
Alexey Dobriyane1759c22008-10-15 23:50:22 +04001#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 = atomic_long_read(&vm_committed_space);
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#ifdef CONFIG_UNEVICTABLE_LRU
68 "Unevictable: %8lu kB\n"
69 "Mlocked: %8lu kB\n"
70#endif
71#ifdef CONFIG_HIGHMEM
72 "HighTotal: %8lu kB\n"
73 "HighFree: %8lu kB\n"
74 "LowTotal: %8lu kB\n"
75 "LowFree: %8lu kB\n"
76#endif
David Howells8feae132009-01-08 12:04:47 +000077#ifndef CONFIG_MMU
78 "MmapCopy: %8lu kB\n"
79#endif
Alexey Dobriyane1759c22008-10-15 23:50:22 +040080 "SwapTotal: %8lu kB\n"
81 "SwapFree: %8lu kB\n"
82 "Dirty: %8lu kB\n"
83 "Writeback: %8lu kB\n"
84 "AnonPages: %8lu kB\n"
85 "Mapped: %8lu kB\n"
86 "Slab: %8lu kB\n"
87 "SReclaimable: %8lu kB\n"
88 "SUnreclaim: %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 K(i.totalram),
102 K(i.freeram),
103 K(i.bufferram),
104 K(cached),
105 K(total_swapcache_pages),
106 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
107 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
108 K(pages[LRU_ACTIVE_ANON]),
109 K(pages[LRU_INACTIVE_ANON]),
110 K(pages[LRU_ACTIVE_FILE]),
111 K(pages[LRU_INACTIVE_FILE]),
112#ifdef CONFIG_UNEVICTABLE_LRU
113 K(pages[LRU_UNEVICTABLE]),
114 K(global_page_state(NR_MLOCK)),
115#endif
116#ifdef CONFIG_HIGHMEM
117 K(i.totalhigh),
118 K(i.freehigh),
119 K(i.totalram-i.totalhigh),
120 K(i.freeram-i.freehigh),
121#endif
David Howells8feae132009-01-08 12:04:47 +0000122#ifndef CONFIG_MMU
123 K((unsigned long) atomic_read(&mmap_pages_allocated)),
124#endif
Alexey Dobriyane1759c22008-10-15 23:50:22 +0400125 K(i.totalswap),
126 K(i.freeswap),
127 K(global_page_state(NR_FILE_DIRTY)),
128 K(global_page_state(NR_WRITEBACK)),
129 K(global_page_state(NR_ANON_PAGES)),
130 K(global_page_state(NR_FILE_MAPPED)),
131 K(global_page_state(NR_SLAB_RECLAIMABLE) +
132 global_page_state(NR_SLAB_UNRECLAIMABLE)),
133 K(global_page_state(NR_SLAB_RECLAIMABLE)),
134 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
135 K(global_page_state(NR_PAGETABLE)),
136#ifdef CONFIG_QUICKLIST
137 K(quicklist_total_size()),
138#endif
139 K(global_page_state(NR_UNSTABLE_NFS)),
140 K(global_page_state(NR_BOUNCE)),
141 K(global_page_state(NR_WRITEBACK_TEMP)),
142 K(allowed),
143 K(committed),
144 (unsigned long)VMALLOC_TOTAL >> 10,
145 vmi.used >> 10,
146 vmi.largest_chunk >> 10
147 );
148
149 hugetlb_report_meminfo(m);
150
151 arch_report_meminfo(m);
152
153 return 0;
154#undef K
155}
156
157static int meminfo_proc_open(struct inode *inode, struct file *file)
158{
159 return single_open(file, meminfo_proc_show, NULL);
160}
161
162static const struct file_operations meminfo_proc_fops = {
163 .open = meminfo_proc_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = single_release,
167};
168
169static int __init proc_meminfo_init(void)
170{
171 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
172 return 0;
173}
174module_init(proc_meminfo_init);