1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/fs.h> 3 #include <linux/init.h> 4 #include <linux/kernel.h> 5 #include <linux/mm.h> 6 #include <linux/hugetlb.h> 7 #include <linux/mman.h> 8 #include <linux/mmzone.h> 9 #include <linux/proc_fs.h> 10 #include <linux/quicklist.h> 11 #include <linux/seq_file.h> 12 #include <linux/swap.h> 13 #include <linux/vmstat.h> 14 #include <linux/atomic.h> 15 #include <linux/vmalloc.h> 16 #ifdef CONFIG_CMA 17 #include <linux/cma.h> 18 #endif 19 #include <asm/page.h> 20 #include <asm/pgtable.h> 21 #include "internal.h" 22 23 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) 24 { 25 } 26 27 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num) 28 { 29 char v[32]; 30 static const char blanks[7] = {' ', ' ', ' ', ' ',' ', ' ', ' '}; 31 int len; 32 33 len = num_to_str(v, sizeof(v), num << (PAGE_SHIFT - 10)); 34 35 seq_write(m, s, 16); 36 37 if (len > 0) { 38 if (len < 8) 39 seq_write(m, blanks, 8 - len); 40 41 seq_write(m, v, len); 42 } 43 seq_write(m, " kB\n", 4); 44 } 45 46 static int meminfo_proc_show(struct seq_file *m, void *v) 47 { 48 struct sysinfo i; 49 unsigned long committed; 50 long cached; 51 long available; 52 unsigned long pages[NR_LRU_LISTS]; 53 int lru; 54 55 si_meminfo(&i); 56 si_swapinfo(&i); 57 committed = percpu_counter_read_positive(&vm_committed_as); 58 59 cached = global_node_page_state(NR_FILE_PAGES) - 60 total_swapcache_pages() - i.bufferram; 61 if (cached < 0) 62 cached = 0; 63 64 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) 65 pages[lru] = global_node_page_state(NR_LRU_BASE + lru); 66 67 available = si_mem_available(); 68 69 show_val_kb(m, "MemTotal: ", i.totalram); 70 show_val_kb(m, "MemFree: ", i.freeram); 71 show_val_kb(m, "MemAvailable: ", available); 72 show_val_kb(m, "Buffers: ", i.bufferram); 73 show_val_kb(m, "Cached: ", cached); 74 show_val_kb(m, "SwapCached: ", total_swapcache_pages()); 75 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] + 76 pages[LRU_ACTIVE_FILE]); 77 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] + 78 pages[LRU_INACTIVE_FILE]); 79 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]); 80 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]); 81 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]); 82 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]); 83 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]); 84 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK)); 85 86 #ifdef CONFIG_HIGHMEM 87 show_val_kb(m, "HighTotal: ", i.totalhigh); 88 show_val_kb(m, "HighFree: ", i.freehigh); 89 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh); 90 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh); 91 #endif 92 93 #ifndef CONFIG_MMU 94 show_val_kb(m, "MmapCopy: ", 95 (unsigned long)atomic_long_read(&mmap_pages_allocated)); 96 #endif 97 98 show_val_kb(m, "SwapTotal: ", i.totalswap); 99 show_val_kb(m, "SwapFree: ", i.freeswap); 100 show_val_kb(m, "Dirty: ", 101 global_node_page_state(NR_FILE_DIRTY)); 102 show_val_kb(m, "Writeback: ", 103 global_node_page_state(NR_WRITEBACK)); 104 show_val_kb(m, "AnonPages: ", 105 global_node_page_state(NR_ANON_MAPPED)); 106 show_val_kb(m, "Mapped: ", 107 global_node_page_state(NR_FILE_MAPPED)); 108 show_val_kb(m, "Shmem: ", i.sharedram); 109 show_val_kb(m, "Slab: ", 110 global_node_page_state(NR_SLAB_RECLAIMABLE) + 111 global_node_page_state(NR_SLAB_UNRECLAIMABLE)); 112 113 show_val_kb(m, "SReclaimable: ", 114 global_node_page_state(NR_SLAB_RECLAIMABLE)); 115 show_val_kb(m, "SUnreclaim: ", 116 global_node_page_state(NR_SLAB_UNRECLAIMABLE)); 117 seq_printf(m, "KernelStack: %8lu kB\n", 118 global_zone_page_state(NR_KERNEL_STACK_KB)); 119 show_val_kb(m, "PageTables: ", 120 global_zone_page_state(NR_PAGETABLE)); 121 #ifdef CONFIG_QUICKLIST 122 show_val_kb(m, "Quicklists: ", quicklist_total_size()); 123 #endif 124 125 show_val_kb(m, "NFS_Unstable: ", 126 global_node_page_state(NR_UNSTABLE_NFS)); 127 show_val_kb(m, "Bounce: ", 128 global_zone_page_state(NR_BOUNCE)); 129 show_val_kb(m, "WritebackTmp: ", 130 global_node_page_state(NR_WRITEBACK_TEMP)); 131 show_val_kb(m, "CommitLimit: ", vm_commit_limit()); 132 show_val_kb(m, "Committed_AS: ", committed); 133 seq_printf(m, "VmallocTotal: %8lu kB\n", 134 (unsigned long)VMALLOC_TOTAL >> 10); 135 show_val_kb(m, "VmallocUsed: ", 0ul); 136 show_val_kb(m, "VmallocChunk: ", 0ul); 137 138 #ifdef CONFIG_MEMORY_FAILURE 139 seq_printf(m, "HardwareCorrupted: %5lu kB\n", 140 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)); 141 #endif 142 143 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 144 show_val_kb(m, "AnonHugePages: ", 145 global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR); 146 show_val_kb(m, "ShmemHugePages: ", 147 global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR); 148 show_val_kb(m, "ShmemPmdMapped: ", 149 global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR); 150 #endif 151 152 #ifdef CONFIG_CMA 153 show_val_kb(m, "CmaTotal: ", totalcma_pages); 154 show_val_kb(m, "CmaFree: ", 155 global_zone_page_state(NR_FREE_CMA_PAGES)); 156 #endif 157 158 hugetlb_report_meminfo(m); 159 160 arch_report_meminfo(m); 161 162 return 0; 163 } 164 165 static int meminfo_proc_open(struct inode *inode, struct file *file) 166 { 167 return single_open(file, meminfo_proc_show, NULL); 168 } 169 170 static const struct file_operations meminfo_proc_fops = { 171 .open = meminfo_proc_open, 172 .read = seq_read, 173 .llseek = seq_lseek, 174 .release = single_release, 175 }; 176 177 static int __init proc_meminfo_init(void) 178 { 179 proc_create("meminfo", 0, NULL, &meminfo_proc_fops); 180 return 0; 181 } 182 fs_initcall(proc_meminfo_init); 183