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