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 "internal.h" 21 22 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) 23 { 24 } 25 26 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num) 27 { 28 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8); 29 seq_write(m, " kB\n", 4); 30 } 31 32 static int meminfo_proc_show(struct seq_file *m, void *v) 33 { 34 struct sysinfo i; 35 unsigned long committed; 36 long cached; 37 long available; 38 unsigned long pages[NR_LRU_LISTS]; 39 unsigned long sreclaimable, sunreclaim; 40 int lru; 41 42 si_meminfo(&i); 43 si_swapinfo(&i); 44 committed = vm_memory_committed(); 45 46 cached = global_node_page_state(NR_FILE_PAGES) - 47 total_swapcache_pages() - i.bufferram; 48 if (cached < 0) 49 cached = 0; 50 51 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) 52 pages[lru] = global_node_page_state(NR_LRU_BASE + lru); 53 54 available = si_mem_available(); 55 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B); 56 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B); 57 58 show_val_kb(m, "MemTotal: ", i.totalram); 59 show_val_kb(m, "MemFree: ", i.freeram); 60 show_val_kb(m, "MemAvailable: ", available); 61 show_val_kb(m, "Buffers: ", i.bufferram); 62 show_val_kb(m, "Cached: ", cached); 63 show_val_kb(m, "SwapCached: ", total_swapcache_pages()); 64 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] + 65 pages[LRU_ACTIVE_FILE]); 66 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] + 67 pages[LRU_INACTIVE_FILE]); 68 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]); 69 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]); 70 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]); 71 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]); 72 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]); 73 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK)); 74 75 #ifdef CONFIG_HIGHMEM 76 show_val_kb(m, "HighTotal: ", i.totalhigh); 77 show_val_kb(m, "HighFree: ", i.freehigh); 78 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh); 79 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh); 80 #endif 81 82 #ifndef CONFIG_MMU 83 show_val_kb(m, "MmapCopy: ", 84 (unsigned long)atomic_long_read(&mmap_pages_allocated)); 85 #endif 86 87 show_val_kb(m, "SwapTotal: ", i.totalswap); 88 show_val_kb(m, "SwapFree: ", i.freeswap); 89 #ifdef CONFIG_ZSWAP 90 seq_printf(m, "Zswap: %8lu kB\n", 91 (unsigned long)(zswap_pool_total_size >> 10)); 92 seq_printf(m, "Zswapped: %8lu kB\n", 93 (unsigned long)atomic_read(&zswap_stored_pages) << 94 (PAGE_SHIFT - 10)); 95 #endif 96 show_val_kb(m, "Dirty: ", 97 global_node_page_state(NR_FILE_DIRTY)); 98 show_val_kb(m, "Writeback: ", 99 global_node_page_state(NR_WRITEBACK)); 100 show_val_kb(m, "AnonPages: ", 101 global_node_page_state(NR_ANON_MAPPED)); 102 show_val_kb(m, "Mapped: ", 103 global_node_page_state(NR_FILE_MAPPED)); 104 show_val_kb(m, "Shmem: ", i.sharedram); 105 show_val_kb(m, "KReclaimable: ", sreclaimable + 106 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE)); 107 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim); 108 show_val_kb(m, "SReclaimable: ", sreclaimable); 109 show_val_kb(m, "SUnreclaim: ", sunreclaim); 110 seq_printf(m, "KernelStack: %8lu kB\n", 111 global_node_page_state(NR_KERNEL_STACK_KB)); 112 #ifdef CONFIG_SHADOW_CALL_STACK 113 seq_printf(m, "ShadowCallStack:%8lu kB\n", 114 global_node_page_state(NR_KERNEL_SCS_KB)); 115 #endif 116 show_val_kb(m, "PageTables: ", 117 global_node_page_state(NR_PAGETABLE)); 118 119 show_val_kb(m, "NFS_Unstable: ", 0); 120 show_val_kb(m, "Bounce: ", 121 global_zone_page_state(NR_BOUNCE)); 122 show_val_kb(m, "WritebackTmp: ", 123 global_node_page_state(NR_WRITEBACK_TEMP)); 124 show_val_kb(m, "CommitLimit: ", vm_commit_limit()); 125 show_val_kb(m, "Committed_AS: ", committed); 126 seq_printf(m, "VmallocTotal: %8lu kB\n", 127 (unsigned long)VMALLOC_TOTAL >> 10); 128 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages()); 129 show_val_kb(m, "VmallocChunk: ", 0ul); 130 show_val_kb(m, "Percpu: ", pcpu_nr_pages()); 131 132 #ifdef CONFIG_MEMORY_FAILURE 133 seq_printf(m, "HardwareCorrupted: %5lu kB\n", 134 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)); 135 #endif 136 137 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 138 show_val_kb(m, "AnonHugePages: ", 139 global_node_page_state(NR_ANON_THPS)); 140 show_val_kb(m, "ShmemHugePages: ", 141 global_node_page_state(NR_SHMEM_THPS)); 142 show_val_kb(m, "ShmemPmdMapped: ", 143 global_node_page_state(NR_SHMEM_PMDMAPPED)); 144 show_val_kb(m, "FileHugePages: ", 145 global_node_page_state(NR_FILE_THPS)); 146 show_val_kb(m, "FilePmdMapped: ", 147 global_node_page_state(NR_FILE_PMDMAPPED)); 148 #endif 149 150 #ifdef CONFIG_CMA 151 show_val_kb(m, "CmaTotal: ", totalcma_pages); 152 show_val_kb(m, "CmaFree: ", 153 global_zone_page_state(NR_FREE_CMA_PAGES)); 154 #endif 155 156 hugetlb_report_meminfo(m); 157 158 arch_report_meminfo(m); 159 160 return 0; 161 } 162 163 static int __init proc_meminfo_init(void) 164 { 165 proc_create_single("meminfo", 0, NULL, meminfo_proc_show); 166 return 0; 167 } 168 fs_initcall(proc_meminfo_init); 169