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/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 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8); 30 seq_write(m, " kB\n", 4); 31 } 32 33 static int meminfo_proc_show(struct seq_file *m, void *v) 34 { 35 struct sysinfo i; 36 unsigned long committed; 37 long cached; 38 long available; 39 unsigned long pages[NR_LRU_LISTS]; 40 unsigned long sreclaimable, sunreclaim; 41 int lru; 42 43 si_meminfo(&i); 44 si_swapinfo(&i); 45 committed = percpu_counter_read_positive(&vm_committed_as); 46 47 cached = global_node_page_state(NR_FILE_PAGES) - 48 total_swapcache_pages() - i.bufferram; 49 if (cached < 0) 50 cached = 0; 51 52 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) 53 pages[lru] = global_node_page_state(NR_LRU_BASE + lru); 54 55 available = si_mem_available(); 56 sreclaimable = global_node_page_state(NR_SLAB_RECLAIMABLE); 57 sunreclaim = global_node_page_state(NR_SLAB_UNRECLAIMABLE); 58 59 show_val_kb(m, "MemTotal: ", i.totalram); 60 show_val_kb(m, "MemFree: ", i.freeram); 61 show_val_kb(m, "MemAvailable: ", available); 62 show_val_kb(m, "Buffers: ", i.bufferram); 63 show_val_kb(m, "Cached: ", cached); 64 show_val_kb(m, "SwapCached: ", total_swapcache_pages()); 65 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] + 66 pages[LRU_ACTIVE_FILE]); 67 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] + 68 pages[LRU_INACTIVE_FILE]); 69 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]); 70 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]); 71 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]); 72 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]); 73 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]); 74 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK)); 75 76 #ifdef CONFIG_HIGHMEM 77 show_val_kb(m, "HighTotal: ", i.totalhigh); 78 show_val_kb(m, "HighFree: ", i.freehigh); 79 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh); 80 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh); 81 #endif 82 83 #ifndef CONFIG_MMU 84 show_val_kb(m, "MmapCopy: ", 85 (unsigned long)atomic_long_read(&mmap_pages_allocated)); 86 #endif 87 88 show_val_kb(m, "SwapTotal: ", i.totalswap); 89 show_val_kb(m, "SwapFree: ", i.freeswap); 90 show_val_kb(m, "Dirty: ", 91 global_node_page_state(NR_FILE_DIRTY)); 92 show_val_kb(m, "Writeback: ", 93 global_node_page_state(NR_WRITEBACK)); 94 show_val_kb(m, "AnonPages: ", 95 global_node_page_state(NR_ANON_MAPPED)); 96 show_val_kb(m, "Mapped: ", 97 global_node_page_state(NR_FILE_MAPPED)); 98 show_val_kb(m, "Shmem: ", i.sharedram); 99 show_val_kb(m, "KReclaimable: ", sreclaimable + 100 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE)); 101 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim); 102 show_val_kb(m, "SReclaimable: ", sreclaimable); 103 show_val_kb(m, "SUnreclaim: ", sunreclaim); 104 seq_printf(m, "KernelStack: %8lu kB\n", 105 global_zone_page_state(NR_KERNEL_STACK_KB)); 106 show_val_kb(m, "PageTables: ", 107 global_zone_page_state(NR_PAGETABLE)); 108 109 show_val_kb(m, "NFS_Unstable: ", 110 global_node_page_state(NR_UNSTABLE_NFS)); 111 show_val_kb(m, "Bounce: ", 112 global_zone_page_state(NR_BOUNCE)); 113 show_val_kb(m, "WritebackTmp: ", 114 global_node_page_state(NR_WRITEBACK_TEMP)); 115 show_val_kb(m, "CommitLimit: ", vm_commit_limit()); 116 show_val_kb(m, "Committed_AS: ", committed); 117 seq_printf(m, "VmallocTotal: %8lu kB\n", 118 (unsigned long)VMALLOC_TOTAL >> 10); 119 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages()); 120 show_val_kb(m, "VmallocChunk: ", 0ul); 121 show_val_kb(m, "Percpu: ", pcpu_nr_pages()); 122 123 #ifdef CONFIG_MEMORY_FAILURE 124 seq_printf(m, "HardwareCorrupted: %5lu kB\n", 125 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)); 126 #endif 127 128 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 129 show_val_kb(m, "AnonHugePages: ", 130 global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR); 131 show_val_kb(m, "ShmemHugePages: ", 132 global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR); 133 show_val_kb(m, "ShmemPmdMapped: ", 134 global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR); 135 show_val_kb(m, "FileHugePages: ", 136 global_node_page_state(NR_FILE_THPS) * HPAGE_PMD_NR); 137 show_val_kb(m, "FilePmdMapped: ", 138 global_node_page_state(NR_FILE_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