fs/proc/meminfo.c

   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);