1#include <linux/fs.h>
2#include <linux/init.h>
3#include <linux/kernel.h>
4#include <linux/mm.h>
5#include <linux/hugetlb.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 <linux/atomic.h>
14#include <linux/vmalloc.h>
15#include <asm/page.h>
16#include <asm/pgtable.h>
17#include "internal.h"
18
19void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
20{
21}
22
23static int meminfo_proc_show(struct seq_file *m, void *v)
24{
25 struct sysinfo i;
26 unsigned long committed;
27 struct vmalloc_info vmi;
28 long cached;
29 long available;
30 unsigned long pagecache;
31 unsigned long wmark_low = 0;
32 unsigned long pages[NR_LRU_LISTS];
33 struct zone *zone;
34 int lru;
35
36
37
38
39#define K(x) ((x) << (PAGE_SHIFT - 10))
40 si_meminfo(&i);
41 si_swapinfo(&i);
42 committed = percpu_counter_read_positive(&vm_committed_as);
43
44 cached = global_page_state(NR_FILE_PAGES) -
45 total_swapcache_pages() - i.bufferram;
46 if (cached < 0)
47 cached = 0;
48
49 get_vmalloc_info(&vmi);
50
51 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
52 pages[lru] = global_page_state(NR_LRU_BASE + lru);
53
54 for_each_zone(zone)
55 wmark_low += zone->watermark[WMARK_LOW];
56
57
58
59
60
61
62
63
64 available = i.freeram - wmark_low;
65
66
67
68
69
70
71 pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE];
72 pagecache -= min(pagecache / 2, wmark_low);
73 available += pagecache;
74
75
76
77
78
79 available += global_page_state(NR_SLAB_RECLAIMABLE) -
80 min(global_page_state(NR_SLAB_RECLAIMABLE) / 2, wmark_low);
81
82 if (available < 0)
83 available = 0;
84
85
86
87
88 seq_printf(m,
89 "MemTotal: %8lu kB\n"
90 "MemFree: %8lu kB\n"
91 "MemAvailable: %8lu kB\n"
92 "Buffers: %8lu kB\n"
93 "Cached: %8lu kB\n"
94 "SwapCached: %8lu kB\n"
95 "Active: %8lu kB\n"
96 "Inactive: %8lu kB\n"
97 "Active(anon): %8lu kB\n"
98 "Inactive(anon): %8lu kB\n"
99 "Active(file): %8lu kB\n"
100 "Inactive(file): %8lu kB\n"
101 "Unevictable: %8lu kB\n"
102 "Mlocked: %8lu kB\n"
103#ifdef CONFIG_HIGHMEM
104 "HighTotal: %8lu kB\n"
105 "HighFree: %8lu kB\n"
106 "LowTotal: %8lu kB\n"
107 "LowFree: %8lu kB\n"
108#endif
109#ifndef CONFIG_MMU
110 "MmapCopy: %8lu kB\n"
111#endif
112 "SwapTotal: %8lu kB\n"
113 "SwapFree: %8lu kB\n"
114 "Dirty: %8lu kB\n"
115 "Writeback: %8lu kB\n"
116 "AnonPages: %8lu kB\n"
117 "Mapped: %8lu kB\n"
118 "Shmem: %8lu kB\n"
119 "Slab: %8lu kB\n"
120 "SReclaimable: %8lu kB\n"
121 "SUnreclaim: %8lu kB\n"
122 "KernelStack: %8lu kB\n"
123 "PageTables: %8lu kB\n"
124#ifdef CONFIG_QUICKLIST
125 "Quicklists: %8lu kB\n"
126#endif
127 "NFS_Unstable: %8lu kB\n"
128 "Bounce: %8lu kB\n"
129 "WritebackTmp: %8lu kB\n"
130 "CommitLimit: %8lu kB\n"
131 "Committed_AS: %8lu kB\n"
132 "VmallocTotal: %8lu kB\n"
133 "VmallocUsed: %8lu kB\n"
134 "VmallocChunk: %8lu kB\n"
135#ifdef CONFIG_MEMORY_FAILURE
136 "HardwareCorrupted: %5lu kB\n"
137#endif
138#ifdef CONFIG_TRANSPARENT_HUGEPAGE
139 "AnonHugePages: %8lu kB\n"
140#endif
141 ,
142 K(i.totalram),
143 K(i.freeram),
144 K(available),
145 K(i.bufferram),
146 K(cached),
147 K(total_swapcache_pages()),
148 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
149 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
150 K(pages[LRU_ACTIVE_ANON]),
151 K(pages[LRU_INACTIVE_ANON]),
152 K(pages[LRU_ACTIVE_FILE]),
153 K(pages[LRU_INACTIVE_FILE]),
154 K(pages[LRU_UNEVICTABLE]),
155 K(global_page_state(NR_MLOCK)),
156#ifdef CONFIG_HIGHMEM
157 K(i.totalhigh),
158 K(i.freehigh),
159 K(i.totalram-i.totalhigh),
160 K(i.freeram-i.freehigh),
161#endif
162#ifndef CONFIG_MMU
163 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
164#endif
165 K(i.totalswap),
166 K(i.freeswap),
167 K(global_page_state(NR_FILE_DIRTY)),
168 K(global_page_state(NR_WRITEBACK)),
169 K(global_page_state(NR_ANON_PAGES)),
170 K(global_page_state(NR_FILE_MAPPED)),
171 K(global_page_state(NR_SHMEM)),
172 K(global_page_state(NR_SLAB_RECLAIMABLE) +
173 global_page_state(NR_SLAB_UNRECLAIMABLE)),
174 K(global_page_state(NR_SLAB_RECLAIMABLE)),
175 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
176 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
177 K(global_page_state(NR_PAGETABLE)),
178#ifdef CONFIG_QUICKLIST
179 K(quicklist_total_size()),
180#endif
181 K(global_page_state(NR_UNSTABLE_NFS)),
182 K(global_page_state(NR_BOUNCE)),
183 K(global_page_state(NR_WRITEBACK_TEMP)),
184 K(vm_commit_limit()),
185 K(committed),
186 (unsigned long)VMALLOC_TOTAL >> 10,
187 vmi.used >> 10,
188 vmi.largest_chunk >> 10
189#ifdef CONFIG_MEMORY_FAILURE
190 ,atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
191#endif
192#ifdef CONFIG_TRANSPARENT_HUGEPAGE
193 ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
194 HPAGE_PMD_NR)
195#endif
196 );
197
198 hugetlb_report_meminfo(m);
199
200 arch_report_meminfo(m);
201
202 return 0;
203#undef K
204}
205
206static int meminfo_proc_open(struct inode *inode, struct file *file)
207{
208 return single_open(file, meminfo_proc_show, NULL);
209}
210
211static const struct file_operations meminfo_proc_fops = {
212 .open = meminfo_proc_open,
213 .read = seq_read,
214 .llseek = seq_lseek,
215 .release = single_release,
216};
217
218static int __init proc_meminfo_init(void)
219{
220 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
221 return 0;
222}
223fs_initcall(proc_meminfo_init);
224
