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TOMOYO Linux Cross Reference
Linux/fs/proc/meminfo.c

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  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 <linux/atomic.h>
 14 #include <linux/vmalloc.h>
 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;
 27         unsigned long allowed;
 28         struct vmalloc_info vmi;
 29         long cached;
 30         unsigned long pages[NR_LRU_LISTS];
 31         int lru;
 32 
 33 /*
 34  * display in kilobytes.
 35  */
 36 #define K(x) ((x) << (PAGE_SHIFT - 10))
 37         si_meminfo(&i);
 38         si_swapinfo(&i);
 39         committed = percpu_counter_read_positive(&vm_committed_as);
 40         allowed = ((totalram_pages - hugetlb_total_pages())
 41                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
 42 
 43         cached = global_page_state(NR_FILE_PAGES) -
 44                         total_swapcache_pages() - i.bufferram;
 45         if (cached < 0)
 46                 cached = 0;
 47 
 48         get_vmalloc_info(&vmi);
 49 
 50         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
 51                 pages[lru] = global_page_state(NR_LRU_BASE + lru);
 52 
 53         /*
 54          * Tagged format, for easy grepping and expansion.
 55          */
 56         seq_printf(m,
 57                 "MemTotal:       %8lu kB\n"
 58                 "MemFree:        %8lu kB\n"
 59                 "Buffers:        %8lu kB\n"
 60                 "Cached:         %8lu kB\n"
 61                 "SwapCached:     %8lu kB\n"
 62                 "Active:         %8lu kB\n"
 63                 "Inactive:       %8lu kB\n"
 64                 "Active(anon):   %8lu kB\n"
 65                 "Inactive(anon): %8lu kB\n"
 66                 "Active(file):   %8lu kB\n"
 67                 "Inactive(file): %8lu kB\n"
 68                 "Unevictable:    %8lu kB\n"
 69                 "Mlocked:        %8lu kB\n"
 70 #ifdef CONFIG_HIGHMEM
 71                 "HighTotal:      %8lu kB\n"
 72                 "HighFree:       %8lu kB\n"
 73                 "LowTotal:       %8lu kB\n"
 74                 "LowFree:        %8lu kB\n"
 75 #endif
 76 #ifndef CONFIG_MMU
 77                 "MmapCopy:       %8lu kB\n"
 78 #endif
 79                 "SwapTotal:      %8lu kB\n"
 80                 "SwapFree:       %8lu kB\n"
 81                 "Dirty:          %8lu kB\n"
 82                 "Writeback:      %8lu kB\n"
 83                 "AnonPages:      %8lu kB\n"
 84                 "Mapped:         %8lu kB\n"
 85                 "Shmem:          %8lu kB\n"
 86                 "Slab:           %8lu kB\n"
 87                 "SReclaimable:   %8lu kB\n"
 88                 "SUnreclaim:     %8lu kB\n"
 89                 "KernelStack:    %8lu kB\n"
 90                 "PageTables:     %8lu kB\n"
 91 #ifdef CONFIG_QUICKLIST
 92                 "Quicklists:     %8lu kB\n"
 93 #endif
 94                 "NFS_Unstable:   %8lu kB\n"
 95                 "Bounce:         %8lu kB\n"
 96                 "WritebackTmp:   %8lu kB\n"
 97                 "CommitLimit:    %8lu kB\n"
 98                 "Committed_AS:   %8lu kB\n"
 99                 "VmallocTotal:   %8lu kB\n"
100                 "VmallocUsed:    %8lu kB\n"
101                 "VmallocChunk:   %8lu kB\n"
102 #ifdef CONFIG_MEMORY_FAILURE
103                 "HardwareCorrupted: %5lu kB\n"
104 #endif
105 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
106                 "AnonHugePages:  %8lu kB\n"
107 #endif
108                 ,
109                 K(i.totalram),
110                 K(i.freeram),
111                 K(i.bufferram),
112                 K(cached),
113                 K(total_swapcache_pages()),
114                 K(pages[LRU_ACTIVE_ANON]   + pages[LRU_ACTIVE_FILE]),
115                 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
116                 K(pages[LRU_ACTIVE_ANON]),
117                 K(pages[LRU_INACTIVE_ANON]),
118                 K(pages[LRU_ACTIVE_FILE]),
119                 K(pages[LRU_INACTIVE_FILE]),
120                 K(pages[LRU_UNEVICTABLE]),
121                 K(global_page_state(NR_MLOCK)),
122 #ifdef CONFIG_HIGHMEM
123                 K(i.totalhigh),
124                 K(i.freehigh),
125                 K(i.totalram-i.totalhigh),
126                 K(i.freeram-i.freehigh),
127 #endif
128 #ifndef CONFIG_MMU
129                 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
130 #endif
131                 K(i.totalswap),
132                 K(i.freeswap),
133                 K(global_page_state(NR_FILE_DIRTY)),
134                 K(global_page_state(NR_WRITEBACK)),
135                 K(global_page_state(NR_ANON_PAGES)),
136                 K(global_page_state(NR_FILE_MAPPED)),
137                 K(global_page_state(NR_SHMEM)),
138                 K(global_page_state(NR_SLAB_RECLAIMABLE) +
139                                 global_page_state(NR_SLAB_UNRECLAIMABLE)),
140                 K(global_page_state(NR_SLAB_RECLAIMABLE)),
141                 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
142                 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
143                 K(global_page_state(NR_PAGETABLE)),
144 #ifdef CONFIG_QUICKLIST
145                 K(quicklist_total_size()),
146 #endif
147                 K(global_page_state(NR_UNSTABLE_NFS)),
148                 K(global_page_state(NR_BOUNCE)),
149                 K(global_page_state(NR_WRITEBACK_TEMP)),
150                 K(allowed),
151                 K(committed),
152                 (unsigned long)VMALLOC_TOTAL >> 10,
153                 vmi.used >> 10,
154                 vmi.largest_chunk >> 10
155 #ifdef CONFIG_MEMORY_FAILURE
156                 ,atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
157 #endif
158 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
159                 ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
160                    HPAGE_PMD_NR)
161 #endif
162                 );
163 
164         hugetlb_report_meminfo(m);
165 
166         arch_report_meminfo(m);
167 
168         return 0;
169 #undef K
170 }
171 
172 static int meminfo_proc_open(struct inode *inode, struct file *file)
173 {
174         return single_open(file, meminfo_proc_show, NULL);
175 }
176 
177 static const struct file_operations meminfo_proc_fops = {
178         .open           = meminfo_proc_open,
179         .read           = seq_read,
180         .llseek         = seq_lseek,
181         .release        = single_release,
182 };
183 
184 static int __init proc_meminfo_init(void)
185 {
186         proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
187         return 0;
188 }
189 module_init(proc_meminfo_init);
190 

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