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); 190