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