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 <asm/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 = atomic_long_read(&vm_committed_space); 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 #ifdef CONFIG_UNEVICTABLE_LRU 68 "Unevictable: %8lu kB\n" 69 "Mlocked: %8lu kB\n" 70 #endif 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 "Slab: %8lu kB\n" 87 "SReclaimable: %8lu kB\n" 88 "SUnreclaim: %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 K(i.totalram), 102 K(i.freeram), 103 K(i.bufferram), 104 K(cached), 105 K(total_swapcache_pages), 106 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]), 107 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]), 108 K(pages[LRU_ACTIVE_ANON]), 109 K(pages[LRU_INACTIVE_ANON]), 110 K(pages[LRU_ACTIVE_FILE]), 111 K(pages[LRU_INACTIVE_FILE]), 112 #ifdef CONFIG_UNEVICTABLE_LRU 113 K(pages[LRU_UNEVICTABLE]), 114 K(global_page_state(NR_MLOCK)), 115 #endif 116 #ifdef CONFIG_HIGHMEM 117 K(i.totalhigh), 118 K(i.freehigh), 119 K(i.totalram-i.totalhigh), 120 K(i.freeram-i.freehigh), 121 #endif 122 #ifndef CONFIG_MMU 123 K((unsigned long) atomic_long_read(&mmap_pages_allocated)), 124 #endif 125 K(i.totalswap), 126 K(i.freeswap), 127 K(global_page_state(NR_FILE_DIRTY)), 128 K(global_page_state(NR_WRITEBACK)), 129 K(global_page_state(NR_ANON_PAGES)), 130 K(global_page_state(NR_FILE_MAPPED)), 131 K(global_page_state(NR_SLAB_RECLAIMABLE) + 132 global_page_state(NR_SLAB_UNRECLAIMABLE)), 133 K(global_page_state(NR_SLAB_RECLAIMABLE)), 134 K(global_page_state(NR_SLAB_UNRECLAIMABLE)), 135 K(global_page_state(NR_PAGETABLE)), 136 #ifdef CONFIG_QUICKLIST 137 K(quicklist_total_size()), 138 #endif 139 K(global_page_state(NR_UNSTABLE_NFS)), 140 K(global_page_state(NR_BOUNCE)), 141 K(global_page_state(NR_WRITEBACK_TEMP)), 142 K(allowed), 143 K(committed), 144 (unsigned long)VMALLOC_TOTAL >> 10, 145 vmi.used >> 10, 146 vmi.largest_chunk >> 10 147 ); 148 149 hugetlb_report_meminfo(m); 150 151 arch_report_meminfo(m); 152 153 return 0; 154 #undef K 155 } 156 157 static int meminfo_proc_open(struct inode *inode, struct file *file) 158 { 159 return single_open(file, meminfo_proc_show, NULL); 160 } 161 162 static const struct file_operations meminfo_proc_fops = { 163 .open = meminfo_proc_open, 164 .read = seq_read, 165 .llseek = seq_lseek, 166 .release = single_release, 167 }; 168 169 static int __init proc_meminfo_init(void) 170 { 171 proc_create("meminfo", 0, NULL, &meminfo_proc_fops); 172 return 0; 173 } 174 module_init(proc_meminfo_init); 175