Commit | Line | Data |
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e1759c21 | 1 | #include <linux/fs.h> |
e1759c21 AD |
2 | #include <linux/init.h> |
3 | #include <linux/kernel.h> | |
4 | #include <linux/mm.h> | |
cb900f41 | 5 | #include <linux/hugetlb.h> |
e1759c21 AD |
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> | |
60063497 | 13 | #include <linux/atomic.h> |
db3808c1 | 14 | #include <linux/vmalloc.h> |
e1759c21 AD |
15 | #include <asm/page.h> |
16 | #include <asm/pgtable.h> | |
17 | #include "internal.h" | |
18 | ||
19 | void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) | |
20 | { | |
21 | } | |
22 | ||
23 | static int meminfo_proc_show(struct seq_file *m, void *v) | |
24 | { | |
25 | struct sysinfo i; | |
26 | unsigned long committed; | |
e1759c21 AD |
27 | struct vmalloc_info vmi; |
28 | long cached; | |
34e431b0 RR |
29 | long available; |
30 | unsigned long pagecache; | |
31 | unsigned long wmark_low = 0; | |
e1759c21 | 32 | unsigned long pages[NR_LRU_LISTS]; |
34e431b0 | 33 | struct zone *zone; |
e1759c21 AD |
34 | int lru; |
35 | ||
36 | /* | |
37 | * display in kilobytes. | |
38 | */ | |
39 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
40 | si_meminfo(&i); | |
41 | si_swapinfo(&i); | |
00a62ce9 | 42 | committed = percpu_counter_read_positive(&vm_committed_as); |
e1759c21 AD |
43 | |
44 | cached = global_page_state(NR_FILE_PAGES) - | |
33806f06 | 45 | total_swapcache_pages() - i.bufferram; |
e1759c21 AD |
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 | ||
34e431b0 RR |
54 | for_each_zone(zone) |
55 | wmark_low += zone->watermark[WMARK_LOW]; | |
56 | ||
57 | /* | |
58 | * Estimate the amount of memory available for userspace allocations, | |
59 | * without causing swapping. | |
60 | * | |
61 | * Free memory cannot be taken below the low watermark, before the | |
62 | * system starts swapping. | |
63 | */ | |
64 | available = i.freeram - wmark_low; | |
65 | ||
66 | /* | |
67 | * Not all the page cache can be freed, otherwise the system will | |
68 | * start swapping. Assume at least half of the page cache, or the | |
69 | * low watermark worth of cache, needs to stay. | |
70 | */ | |
71 | pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE]; | |
72 | pagecache -= min(pagecache / 2, wmark_low); | |
73 | available += pagecache; | |
74 | ||
75 | /* | |
f0b5664b | 76 | * Part of the reclaimable slab consists of items that are in use, |
34e431b0 RR |
77 | * and cannot be freed. Cap this estimate at the low watermark. |
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 | ||
e1759c21 AD |
85 | /* |
86 | * Tagged format, for easy grepping and expansion. | |
87 | */ | |
88 | seq_printf(m, | |
89 | "MemTotal: %8lu kB\n" | |
90 | "MemFree: %8lu kB\n" | |
34e431b0 | 91 | "MemAvailable: %8lu kB\n" |
e1759c21 AD |
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" | |
e1759c21 AD |
101 | "Unevictable: %8lu kB\n" |
102 | "Mlocked: %8lu kB\n" | |
e1759c21 AD |
103 | #ifdef CONFIG_HIGHMEM |
104 | "HighTotal: %8lu kB\n" | |
105 | "HighFree: %8lu kB\n" | |
106 | "LowTotal: %8lu kB\n" | |
107 | "LowFree: %8lu kB\n" | |
8feae131 DH |
108 | #endif |
109 | #ifndef CONFIG_MMU | |
110 | "MmapCopy: %8lu kB\n" | |
e1759c21 AD |
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" | |
4b02108a | 118 | "Shmem: %8lu kB\n" |
e1759c21 AD |
119 | "Slab: %8lu kB\n" |
120 | "SReclaimable: %8lu kB\n" | |
121 | "SUnreclaim: %8lu kB\n" | |
c6a7f572 | 122 | "KernelStack: %8lu kB\n" |
e1759c21 AD |
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" | |
6a46079c AK |
134 | "VmallocChunk: %8lu kB\n" |
135 | #ifdef CONFIG_MEMORY_FAILURE | |
370c28de | 136 | "HardwareCorrupted: %5lu kB\n" |
79134171 AA |
137 | #endif |
138 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | |
139 | "AnonHugePages: %8lu kB\n" | |
6a46079c AK |
140 | #endif |
141 | , | |
e1759c21 AD |
142 | K(i.totalram), |
143 | K(i.freeram), | |
34e431b0 | 144 | K(available), |
e1759c21 AD |
145 | K(i.bufferram), |
146 | K(cached), | |
33806f06 | 147 | K(total_swapcache_pages()), |
e1759c21 AD |
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]), | |
e1759c21 AD |
154 | K(pages[LRU_UNEVICTABLE]), |
155 | K(global_page_state(NR_MLOCK)), | |
e1759c21 AD |
156 | #ifdef CONFIG_HIGHMEM |
157 | K(i.totalhigh), | |
158 | K(i.freehigh), | |
159 | K(i.totalram-i.totalhigh), | |
160 | K(i.freeram-i.freehigh), | |
8feae131 DH |
161 | #endif |
162 | #ifndef CONFIG_MMU | |
33e5d769 | 163 | K((unsigned long) atomic_long_read(&mmap_pages_allocated)), |
e1759c21 AD |
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)), | |
b53fc7c2 | 169 | K(global_page_state(NR_ANON_PAGES)), |
e1759c21 | 170 | K(global_page_state(NR_FILE_MAPPED)), |
4b02108a | 171 | K(global_page_state(NR_SHMEM)), |
e1759c21 AD |
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)), | |
c6a7f572 | 176 | global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024, |
e1759c21 AD |
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)), | |
00619bcc | 184 | K(vm_commit_limit()), |
e1759c21 AD |
185 | K(committed), |
186 | (unsigned long)VMALLOC_TOTAL >> 10, | |
187 | vmi.used >> 10, | |
188 | vmi.largest_chunk >> 10 | |
6a46079c | 189 | #ifdef CONFIG_MEMORY_FAILURE |
293c07e3 | 190 | ,atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10) |
79134171 AA |
191 | #endif |
192 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | |
193 | ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) * | |
194 | HPAGE_PMD_NR) | |
6a46079c | 195 | #endif |
e1759c21 AD |
196 | ); |
197 | ||
198 | hugetlb_report_meminfo(m); | |
199 | ||
200 | arch_report_meminfo(m); | |
201 | ||
202 | return 0; | |
203 | #undef K | |
204 | } | |
205 | ||
206 | static int meminfo_proc_open(struct inode *inode, struct file *file) | |
207 | { | |
208 | return single_open(file, meminfo_proc_show, NULL); | |
209 | } | |
210 | ||
211 | static 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 | ||
218 | static int __init proc_meminfo_init(void) | |
219 | { | |
220 | proc_create("meminfo", 0, NULL, &meminfo_proc_fops); | |
221 | return 0; | |
222 | } | |
abaf3787 | 223 | fs_initcall(proc_meminfo_init); |