Linux 2.6.31.6
[linux/fpc-iii.git] / fs / proc / meminfo.c
blobd5c410d47faef162d3edf1876f8582baec0936e9
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"
18 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
22 static int meminfo_proc_show(struct seq_file *m, void *v)
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;
33 * display in kilobytes.
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;
42 cached = global_page_state(NR_FILE_PAGES) -
43 total_swapcache_pages - i.bufferram;
44 if (cached < 0)
45 cached = 0;
47 get_vmalloc_info(&vmi);
49 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
50 pages[lru] = global_page_state(NR_LRU_BASE + lru);
53 * Tagged format, for easy grepping and expansion.
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 "Slab: %8lu kB\n"
85 "SReclaimable: %8lu kB\n"
86 "SUnreclaim: %8lu kB\n"
87 "PageTables: %8lu kB\n"
88 #ifdef CONFIG_QUICKLIST
89 "Quicklists: %8lu kB\n"
90 #endif
91 "NFS_Unstable: %8lu kB\n"
92 "Bounce: %8lu kB\n"
93 "WritebackTmp: %8lu kB\n"
94 "CommitLimit: %8lu kB\n"
95 "Committed_AS: %8lu kB\n"
96 "VmallocTotal: %8lu kB\n"
97 "VmallocUsed: %8lu kB\n"
98 "VmallocChunk: %8lu kB\n",
99 K(i.totalram),
100 K(i.freeram),
101 K(i.bufferram),
102 K(cached),
103 K(total_swapcache_pages),
104 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
105 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
106 K(pages[LRU_ACTIVE_ANON]),
107 K(pages[LRU_INACTIVE_ANON]),
108 K(pages[LRU_ACTIVE_FILE]),
109 K(pages[LRU_INACTIVE_FILE]),
110 K(pages[LRU_UNEVICTABLE]),
111 K(global_page_state(NR_MLOCK)),
112 #ifdef CONFIG_HIGHMEM
113 K(i.totalhigh),
114 K(i.freehigh),
115 K(i.totalram-i.totalhigh),
116 K(i.freeram-i.freehigh),
117 #endif
118 #ifndef CONFIG_MMU
119 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
120 #endif
121 K(i.totalswap),
122 K(i.freeswap),
123 K(global_page_state(NR_FILE_DIRTY)),
124 K(global_page_state(NR_WRITEBACK)),
125 K(global_page_state(NR_ANON_PAGES)),
126 K(global_page_state(NR_FILE_MAPPED)),
127 K(global_page_state(NR_SLAB_RECLAIMABLE) +
128 global_page_state(NR_SLAB_UNRECLAIMABLE)),
129 K(global_page_state(NR_SLAB_RECLAIMABLE)),
130 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
131 K(global_page_state(NR_PAGETABLE)),
132 #ifdef CONFIG_QUICKLIST
133 K(quicklist_total_size()),
134 #endif
135 K(global_page_state(NR_UNSTABLE_NFS)),
136 K(global_page_state(NR_BOUNCE)),
137 K(global_page_state(NR_WRITEBACK_TEMP)),
138 K(allowed),
139 K(committed),
140 (unsigned long)VMALLOC_TOTAL >> 10,
141 vmi.used >> 10,
142 vmi.largest_chunk >> 10
145 hugetlb_report_meminfo(m);
147 arch_report_meminfo(m);
149 return 0;
150 #undef K
153 static int meminfo_proc_open(struct inode *inode, struct file *file)
155 return single_open(file, meminfo_proc_show, NULL);
158 static const struct file_operations meminfo_proc_fops = {
159 .open = meminfo_proc_open,
160 .read = seq_read,
161 .llseek = seq_lseek,
162 .release = single_release,
165 static int __init proc_meminfo_init(void)
167 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
168 return 0;
170 module_init(proc_meminfo_init);