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