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Linux/fs/proc/meminfo.c

  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 
 22 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
 23 {
 24 }
 25 
 26 static int meminfo_proc_show(struct seq_file *m, void *v)
 27 {
 28         struct sysinfo i;
 29         unsigned long committed;
 30         long cached;
 31         long available;
 32         unsigned long pages[NR_LRU_LISTS];
 33         int lru;
 34 
 35 /*
 36  * display in kilobytes.
 37  */
 38 #define K(x) ((x) << (PAGE_SHIFT - 10))
 39         si_meminfo(&i);
 40         si_swapinfo(&i);
 41         committed = percpu_counter_read_positive(&vm_committed_as);
 42 
 43         cached = global_node_page_state(NR_FILE_PAGES) -
 44                         total_swapcache_pages() - i.bufferram;
 45         if (cached < 0)
 46                 cached = 0;
 47 
 48         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
 49                 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
 50 
 51         available = si_mem_available();
 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                 "MemAvailable:   %8lu kB\n"
 60                 "Buffers:        %8lu kB\n"
 61                 "Cached:         %8lu kB\n"
 62                 "SwapCached:     %8lu kB\n"
 63                 "Active:         %8lu kB\n"
 64                 "Inactive:       %8lu kB\n"
 65                 "Active(anon):   %8lu kB\n"
 66                 "Inactive(anon): %8lu kB\n"
 67                 "Active(file):   %8lu kB\n"
 68                 "Inactive(file): %8lu kB\n"
 69                 "Unevictable:    %8lu kB\n"
 70                 "Mlocked:        %8lu kB\n"
 71 #ifdef CONFIG_HIGHMEM
 72                 "HighTotal:      %8lu kB\n"
 73                 "HighFree:       %8lu kB\n"
 74                 "LowTotal:       %8lu kB\n"
 75                 "LowFree:        %8lu kB\n"
 76 #endif
 77 #ifndef CONFIG_MMU
 78                 "MmapCopy:       %8lu kB\n"
 79 #endif
 80                 "SwapTotal:      %8lu kB\n"
 81                 "SwapFree:       %8lu kB\n"
 82                 "Dirty:          %8lu kB\n"
 83                 "Writeback:      %8lu kB\n"
 84                 "AnonPages:      %8lu kB\n"
 85                 "Mapped:         %8lu kB\n"
 86                 "Shmem:          %8lu kB\n"
 87                 "Slab:           %8lu kB\n"
 88                 "SReclaimable:   %8lu kB\n"
 89                 "SUnreclaim:     %8lu kB\n"
 90                 "KernelStack:    %8lu kB\n"
 91                 "PageTables:     %8lu kB\n"
 92 #ifdef CONFIG_QUICKLIST
 93                 "Quicklists:     %8lu kB\n"
 94 #endif
 95                 "NFS_Unstable:   %8lu kB\n"
 96                 "Bounce:         %8lu kB\n"
 97                 "WritebackTmp:   %8lu kB\n"
 98                 "CommitLimit:    %8lu kB\n"
 99                 "Committed_AS:   %8lu kB\n"
100                 "VmallocTotal:   %8lu kB\n"
101                 "VmallocUsed:    %8lu kB\n"
102                 "VmallocChunk:   %8lu kB\n"
103 #ifdef CONFIG_MEMORY_FAILURE
104                 "HardwareCorrupted: %5lu kB\n"
105 #endif
106 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
107                 "AnonHugePages:  %8lu kB\n"
108                 "ShmemHugePages: %8lu kB\n"
109                 "ShmemPmdMapped: %8lu kB\n"
110 #endif
111 #ifdef CONFIG_CMA
112                 "CmaTotal:       %8lu kB\n"
113                 "CmaFree:        %8lu kB\n"
114 #endif
115                 ,
116                 K(i.totalram),
117                 K(i.freeram),
118                 K(available),
119                 K(i.bufferram),
120                 K(cached),
121                 K(total_swapcache_pages()),
122                 K(pages[LRU_ACTIVE_ANON]   + pages[LRU_ACTIVE_FILE]),
123                 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
124                 K(pages[LRU_ACTIVE_ANON]),
125                 K(pages[LRU_INACTIVE_ANON]),
126                 K(pages[LRU_ACTIVE_FILE]),
127                 K(pages[LRU_INACTIVE_FILE]),
128                 K(pages[LRU_UNEVICTABLE]),
129                 K(global_page_state(NR_MLOCK)),
130 #ifdef CONFIG_HIGHMEM
131                 K(i.totalhigh),
132                 K(i.freehigh),
133                 K(i.totalram-i.totalhigh),
134                 K(i.freeram-i.freehigh),
135 #endif
136 #ifndef CONFIG_MMU
137                 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
138 #endif
139                 K(i.totalswap),
140                 K(i.freeswap),
141                 K(global_node_page_state(NR_FILE_DIRTY)),
142                 K(global_node_page_state(NR_WRITEBACK)),
143                 K(global_node_page_state(NR_ANON_MAPPED)),
144                 K(global_node_page_state(NR_FILE_MAPPED)),
145                 K(i.sharedram),
146                 K(global_page_state(NR_SLAB_RECLAIMABLE) +
147                                 global_page_state(NR_SLAB_UNRECLAIMABLE)),
148                 K(global_page_state(NR_SLAB_RECLAIMABLE)),
149                 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
150                 global_page_state(NR_KERNEL_STACK_KB),
151                 K(global_page_state(NR_PAGETABLE)),
152 #ifdef CONFIG_QUICKLIST
153                 K(quicklist_total_size()),
154 #endif
155                 K(global_node_page_state(NR_UNSTABLE_NFS)),
156                 K(global_page_state(NR_BOUNCE)),
157                 K(global_node_page_state(NR_WRITEBACK_TEMP)),
158                 K(vm_commit_limit()),
159                 K(committed),
160                 (unsigned long)VMALLOC_TOTAL >> 10,
161                 0ul, // used to be vmalloc 'used'
162                 0ul  // used to be vmalloc 'largest_chunk'
163 #ifdef CONFIG_MEMORY_FAILURE
164                 , atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
165 #endif
166 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
167                 , K(global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR)
168                 , K(global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR)
169                 , K(global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR)
170 #endif
171 #ifdef CONFIG_CMA
172                 , K(totalcma_pages)
173                 , K(global_page_state(NR_FREE_CMA_PAGES))
174 #endif
175                 );
176 
177         hugetlb_report_meminfo(m);
178 
179         arch_report_meminfo(m);
180 
181         return 0;
182 #undef K
183 }
184 
185 static int meminfo_proc_open(struct inode *inode, struct file *file)
186 {
187         return single_open(file, meminfo_proc_show, NULL);
188 }
189 
190 static const struct file_operations meminfo_proc_fops = {
191         .open           = meminfo_proc_open,
192         .read           = seq_read,
193         .llseek         = seq_lseek,
194         .release        = single_release,
195 };
196 
197 static int __init proc_meminfo_init(void)
198 {
199         proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
200         return 0;
201 }
202 fs_initcall(proc_meminfo_init);
203 

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