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/memblock.h> 10 #include <linux/proc_fs.h> 11 #include <linux/percpu.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 <linux/zswap.h> 21 #include <asm/page.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 = vm_memory_committed(); 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_pages(NR_SLAB_RECLAIMABLE_B); 58 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B); 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 #ifdef CONFIG_ZSWAP 92 seq_printf(m, "Zswap: %8lu kB\n", 93 (unsigned long)(zswap_pool_total_size >> 10)); 94 seq_printf(m, "Zswapped: %8lu kB\n", 95 (unsigned long)atomic_read(&zswap_stored_pages) << 96 (PAGE_SHIFT - 10)); 97 #endif 98 show_val_kb(m, "Dirty: ", 99 global_node_page_state(NR_FILE_DIRTY)); 100 show_val_kb(m, "Writeback: ", 101 global_node_page_state(NR_WRITEBACK)); 102 show_val_kb(m, "AnonPages: ", 103 global_node_page_state(NR_ANON_MAPPED)); 104 show_val_kb(m, "Mapped: ", 105 global_node_page_state(NR_FILE_MAPPED)); 106 show_val_kb(m, "Shmem: ", i.sharedram); 107 show_val_kb(m, "KReclaimable: ", sreclaimable + 108 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE)); 109 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim); 110 show_val_kb(m, "SReclaimable: ", sreclaimable); 111 show_val_kb(m, "SUnreclaim: ", sunreclaim); 112 seq_printf(m, "KernelStack: %8lu kB\n", 113 global_node_page_state(NR_KERNEL_STACK_KB)); 114 #ifdef CONFIG_SHADOW_CALL_STACK 115 seq_printf(m, "ShadowCallStack:%8lu kB\n", 116 global_node_page_state(NR_KERNEL_SCS_KB)); 117 #endif 118 show_val_kb(m, "PageTables: ", 119 global_node_page_state(NR_PAGETABLE)); 120 show_val_kb(m, "SecPageTables: ", 121 global_node_page_state(NR_SECONDARY_PAGETABLE)); 122 123 show_val_kb(m, "NFS_Unstable: ", 0); 124 show_val_kb(m, "Bounce: ", 125 global_zone_page_state(NR_BOUNCE)); 126 show_val_kb(m, "WritebackTmp: ", 127 global_node_page_state(NR_WRITEBACK_TEMP)); 128 show_val_kb(m, "CommitLimit: ", vm_commit_limit()); 129 show_val_kb(m, "Committed_AS: ", committed); 130 seq_printf(m, "VmallocTotal: %8lu kB\n", 131 (unsigned long)VMALLOC_TOTAL >> 10); 132 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages()); 133 show_val_kb(m, "VmallocChunk: ", 0ul); 134 show_val_kb(m, "Percpu: ", pcpu_nr_pages()); 135 136 memtest_report_meminfo(m); 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)); 146 show_val_kb(m, "ShmemHugePages: ", 147 global_node_page_state(NR_SHMEM_THPS)); 148 show_val_kb(m, "ShmemPmdMapped: ", 149 global_node_page_state(NR_SHMEM_PMDMAPPED)); 150 show_val_kb(m, "FileHugePages: ", 151 global_node_page_state(NR_FILE_THPS)); 152 show_val_kb(m, "FilePmdMapped: ", 153 global_node_page_state(NR_FILE_PMDMAPPED)); 154 #endif 155 156 #ifdef CONFIG_CMA 157 show_val_kb(m, "CmaTotal: ", totalcma_pages); 158 show_val_kb(m, "CmaFree: ", 159 global_zone_page_state(NR_FREE_CMA_PAGES)); 160 #endif 161 162 #ifdef CONFIG_UNACCEPTED_MEMORY 163 show_val_kb(m, "Unaccepted: ", 164 global_zone_page_state(NR_UNACCEPTED)); 165 #endif 166 167 hugetlb_report_meminfo(m); 168 169 arch_report_meminfo(m); 170 171 return 0; 172 } 173 174 static int __init proc_meminfo_init(void) 175 { 176 struct proc_dir_entry *pde; 177 178 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show); 179 pde_make_permanent(pde); 180 return 0; 181 } 182 fs_initcall(proc_meminfo_init); 183