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 <asm/page.h> 15 #include <asm/pgtable.h> 16 #include "internal.h" 17 18 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) 19 { 20 } 21 22 static int meminfo_proc_show(struct seq_file *m, void *v) 23 { 24 struct sysinfo i; 25 unsigned long committed; 26 unsigned long allowed; 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 allowed = ((totalram_pages - hugetlb_total_pages()) 40 * sysctl_overcommit_ratio / 100) + total_swap_pages; 41 42 cached = global_page_state(NR_FILE_PAGES) - 43 total_swapcache_pages - i.bufferram; 44 if (cached < 0) 45 cached = 0; 46 47 get_vmalloc_info(&vmi); 48 49 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) 50 pages[lru] = global_page_state(NR_LRU_BASE + lru); 51 52 /* 53 * Tagged format, for easy grepping and expansion. 54 */ 55 seq_printf(m, 56 "MemTotal: %8lu kB\n" 57 "MemFree: %8lu kB\n" 58 "Buffers: %8lu kB\n" 59 "Cached: %8lu kB\n" 60 "SwapCached: %8lu kB\n" 61 "Active: %8lu kB\n" 62 "Inactive: %8lu kB\n" 63 "Active(anon): %8lu kB\n" 64 "Inactive(anon): %8lu kB\n" 65 "Active(file): %8lu kB\n" 66 "Inactive(file): %8lu kB\n" 67 "Unevictable: %8lu kB\n" 68 "Mlocked: %8lu kB\n" 69 #ifdef CONFIG_HIGHMEM 70 "HighTotal: %8lu kB\n" 71 "HighFree: %8lu kB\n" 72 "LowTotal: %8lu kB\n" 73 "LowFree: %8lu kB\n" 74 #endif 75 #ifndef CONFIG_MMU 76 "MmapCopy: %8lu kB\n" 77 #endif 78 "SwapTotal: %8lu kB\n" 79 "SwapFree: %8lu kB\n" 80 "Dirty: %8lu kB\n" 81 "Writeback: %8lu kB\n" 82 "AnonPages: %8lu kB\n" 83 "Mapped: %8lu kB\n" 84 "Shmem: %8lu kB\n" 85 "Slab: %8lu kB\n" 86 "SReclaimable: %8lu kB\n" 87 "SUnreclaim: %8lu kB\n" 88 "KernelStack: %8lu kB\n" 89 "PageTables: %8lu kB\n" 90 #ifdef CONFIG_QUICKLIST 91 "Quicklists: %8lu kB\n" 92 #endif 93 "NFS_Unstable: %8lu kB\n" 94 "Bounce: %8lu kB\n" 95 "WritebackTmp: %8lu kB\n" 96 "CommitLimit: %8lu kB\n" 97 "Committed_AS: %8lu kB\n" 98 "VmallocTotal: %8lu kB\n" 99 "VmallocUsed: %8lu kB\n" 100 "VmallocChunk: %8lu kB\n" 101 #ifdef CONFIG_MEMORY_FAILURE 102 "HardwareCorrupted: %5lu kB\n" 103 #endif 104 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 105 "AnonHugePages: %8lu kB\n" 106 #endif 107 , 108 K(i.totalram), 109 K(i.freeram), 110 K(i.bufferram), 111 K(cached), 112 K(total_swapcache_pages), 113 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]), 114 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]), 115 K(pages[LRU_ACTIVE_ANON]), 116 K(pages[LRU_INACTIVE_ANON]), 117 K(pages[LRU_ACTIVE_FILE]), 118 K(pages[LRU_INACTIVE_FILE]), 119 K(pages[LRU_UNEVICTABLE]), 120 K(global_page_state(NR_MLOCK)), 121 #ifdef CONFIG_HIGHMEM 122 K(i.totalhigh), 123 K(i.freehigh), 124 K(i.totalram-i.totalhigh), 125 K(i.freeram-i.freehigh), 126 #endif 127 #ifndef CONFIG_MMU 128 K((unsigned long) atomic_long_read(&mmap_pages_allocated)), 129 #endif 130 K(i.totalswap), 131 K(i.freeswap), 132 K(global_page_state(NR_FILE_DIRTY)), 133 K(global_page_state(NR_WRITEBACK)), 134 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 135 K(global_page_state(NR_ANON_PAGES) 136 + global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) * 137 HPAGE_PMD_NR), 138 #else 139 K(global_page_state(NR_ANON_PAGES)), 140 #endif 141 K(global_page_state(NR_FILE_MAPPED)), 142 K(global_page_state(NR_SHMEM)), 143 K(global_page_state(NR_SLAB_RECLAIMABLE) + 144 global_page_state(NR_SLAB_UNRECLAIMABLE)), 145 K(global_page_state(NR_SLAB_RECLAIMABLE)), 146 K(global_page_state(NR_SLAB_UNRECLAIMABLE)), 147 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024, 148 K(global_page_state(NR_PAGETABLE)), 149 #ifdef CONFIG_QUICKLIST 150 K(quicklist_total_size()), 151 #endif 152 K(global_page_state(NR_UNSTABLE_NFS)), 153 K(global_page_state(NR_BOUNCE)), 154 K(global_page_state(NR_WRITEBACK_TEMP)), 155 K(allowed), 156 K(committed), 157 (unsigned long)VMALLOC_TOTAL >> 10, 158 vmi.used >> 10, 159 vmi.largest_chunk >> 10 160 #ifdef CONFIG_MEMORY_FAILURE 161 ,atomic_long_read(&mce_bad_pages) << (PAGE_SHIFT - 10) 162 #endif 163 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 164 ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) * 165 HPAGE_PMD_NR) 166 #endif 167 ); 168 169 hugetlb_report_meminfo(m); 170 171 arch_report_meminfo(m); 172 173 return 0; 174 #undef K 175 } 176 177 static int meminfo_proc_open(struct inode *inode, struct file *file) 178 { 179 return single_open(file, meminfo_proc_show, NULL); 180 } 181 182 static const struct file_operations meminfo_proc_fops = { 183 .open = meminfo_proc_open, 184 .read = seq_read, 185 .llseek = seq_lseek, 186 .release = single_release, 187 }; 188 189 static int __init proc_meminfo_init(void) 190 { 191 proc_create("meminfo", 0, NULL, &meminfo_proc_fops); 192 return 0; 193 } 194 module_init(proc_meminfo_init); 195