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#ifdef CONFIG_CMA
16#include <linux/cma.h>
17#endif
18#include <asm/page.h>
19#include <asm/pgtable.h>
20#include "internal.h"
21
22void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
23{
24}
25
26static int meminfo_proc_show(struct seq_file *m, void *v)
27{
28 struct sysinfo i;
29 unsigned long committed;
30 struct vmalloc_info vmi;
31 long cached;
32 long available;
33 unsigned long pagecache;
34 unsigned long wmark_low = 0;
35 unsigned long pages[NR_LRU_LISTS];
36 struct zone *zone;
37 int lru;
38
39
40
41
42#define K(x) ((x) << (PAGE_SHIFT - 10))
43 si_meminfo(&i);
44 si_swapinfo(&i);
45 committed = percpu_counter_read_positive(&vm_committed_as);
46
47 cached = global_page_state(NR_FILE_PAGES) -
48 total_swapcache_pages() - i.bufferram;
49 if (cached < 0)
50 cached = 0;
51
52 get_vmalloc_info(&vmi);
53
54 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
55 pages[lru] = global_page_state(NR_LRU_BASE + lru);
56
57 for_each_zone(zone)
58 wmark_low += zone->watermark[WMARK_LOW];
59
60
61
62
63
64
65
66
67 available = i.freeram - wmark_low;
68
69
70
71
72
73
74 pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE];
75 pagecache -= min(pagecache / 2, wmark_low);
76 available += pagecache;
77
78
79
80
81
82 available += global_page_state(NR_SLAB_RECLAIMABLE) -
83 min(global_page_state(NR_SLAB_RECLAIMABLE) / 2, wmark_low);
84
85 if (available < 0)
86 available = 0;
87
88
89
90
91 seq_printf(m,
92 "MemTotal: %8lu kB\n"
93 "MemFree: %8lu kB\n"
94 "MemAvailable: %8lu kB\n"
95 "Buffers: %8lu kB\n"
96 "Cached: %8lu kB\n"
97 "SwapCached: %8lu kB\n"
98 "Active: %8lu kB\n"
99 "Inactive: %8lu kB\n"
100 "Active(anon): %8lu kB\n"
101 "Inactive(anon): %8lu kB\n"
102 "Active(file): %8lu kB\n"
103 "Inactive(file): %8lu kB\n"
104 "Unevictable: %8lu kB\n"
105 "Mlocked: %8lu kB\n"
106#ifdef CONFIG_HIGHMEM
107 "HighTotal: %8lu kB\n"
108 "HighFree: %8lu kB\n"
109 "LowTotal: %8lu kB\n"
110 "LowFree: %8lu kB\n"
111#endif
112#ifndef CONFIG_MMU
113 "MmapCopy: %8lu kB\n"
114#endif
115 "SwapTotal: %8lu kB\n"
116 "SwapFree: %8lu kB\n"
117 "Dirty: %8lu kB\n"
118 "Writeback: %8lu kB\n"
119 "AnonPages: %8lu kB\n"
120 "Mapped: %8lu kB\n"
121 "Shmem: %8lu kB\n"
122 "Slab: %8lu kB\n"
123 "SReclaimable: %8lu kB\n"
124 "SUnreclaim: %8lu kB\n"
125 "KernelStack: %8lu kB\n"
126 "PageTables: %8lu kB\n"
127#ifdef CONFIG_QUICKLIST
128 "Quicklists: %8lu kB\n"
129#endif
130 "NFS_Unstable: %8lu kB\n"
131 "Bounce: %8lu kB\n"
132 "WritebackTmp: %8lu kB\n"
133 "CommitLimit: %8lu kB\n"
134 "Committed_AS: %8lu kB\n"
135 "VmallocTotal: %8lu kB\n"
136 "VmallocUsed: %8lu kB\n"
137 "VmallocChunk: %8lu kB\n"
138#ifdef CONFIG_MEMORY_FAILURE
139 "HardwareCorrupted: %5lu kB\n"
140#endif
141#ifdef CONFIG_TRANSPARENT_HUGEPAGE
142 "AnonHugePages: %8lu kB\n"
143#endif
144#ifdef CONFIG_CMA
145 "CmaTotal: %8lu kB\n"
146 "CmaFree: %8lu kB\n"
147#endif
148 ,
149 K(i.totalram),
150 K(i.freeram),
151 K(available),
152 K(i.bufferram),
153 K(cached),
154 K(total_swapcache_pages()),
155 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
156 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
157 K(pages[LRU_ACTIVE_ANON]),
158 K(pages[LRU_INACTIVE_ANON]),
159 K(pages[LRU_ACTIVE_FILE]),
160 K(pages[LRU_INACTIVE_FILE]),
161 K(pages[LRU_UNEVICTABLE]),
162 K(global_page_state(NR_MLOCK)),
163#ifdef CONFIG_HIGHMEM
164 K(i.totalhigh),
165 K(i.freehigh),
166 K(i.totalram-i.totalhigh),
167 K(i.freeram-i.freehigh),
168#endif
169#ifndef CONFIG_MMU
170 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
171#endif
172 K(i.totalswap),
173 K(i.freeswap),
174 K(global_page_state(NR_FILE_DIRTY)),
175 K(global_page_state(NR_WRITEBACK)),
176 K(global_page_state(NR_ANON_PAGES)),
177 K(global_page_state(NR_FILE_MAPPED)),
178 K(i.sharedram),
179 K(global_page_state(NR_SLAB_RECLAIMABLE) +
180 global_page_state(NR_SLAB_UNRECLAIMABLE)),
181 K(global_page_state(NR_SLAB_RECLAIMABLE)),
182 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
183 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
184 K(global_page_state(NR_PAGETABLE)),
185#ifdef CONFIG_QUICKLIST
186 K(quicklist_total_size()),
187#endif
188 K(global_page_state(NR_UNSTABLE_NFS)),
189 K(global_page_state(NR_BOUNCE)),
190 K(global_page_state(NR_WRITEBACK_TEMP)),
191 K(vm_commit_limit()),
192 K(committed),
193 (unsigned long)VMALLOC_TOTAL >> 10,
194 vmi.used >> 10,
195 vmi.largest_chunk >> 10
196#ifdef CONFIG_MEMORY_FAILURE
197 , atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
198#endif
199#ifdef CONFIG_TRANSPARENT_HUGEPAGE
200 , K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
201 HPAGE_PMD_NR)
202#endif
203#ifdef CONFIG_CMA
204 , K(totalcma_pages)
205 , K(global_page_state(NR_FREE_CMA_PAGES))
206#endif
207 );
208
209 hugetlb_report_meminfo(m);
210
211 arch_report_meminfo(m);
212
213 return 0;
214#undef K
215}
216
217static int meminfo_proc_open(struct inode *inode, struct file *file)
218{
219 return single_open(file, meminfo_proc_show, NULL);
220}
221
222static const struct file_operations meminfo_proc_fops = {
223 .open = meminfo_proc_open,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = single_release,
227};
228
229static int __init proc_meminfo_init(void)
230{
231 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
232 return 0;
233}
234fs_initcall(proc_meminfo_init);
235
