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#ifdef CONFIG_MEM_PURGEABLE 21#include <linux/mm_purgeable.h> 22#endif 23#include <linux/zswap.h> 24#include <asm/page.h> 25#include "internal.h" 26 27void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) 28{ 29} 30 31static void show_val_kb(struct seq_file *m, const char *s, unsigned long num) 32{ 33 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8); 34 seq_write(m, " kB\n", 4); 35} 36 37static int meminfo_proc_show(struct seq_file *m, void *v) 38{ 39 struct sysinfo i; 40 unsigned long committed; 41 long cached; 42 long available; 43 unsigned long pages[NR_LRU_LISTS]; 44 unsigned long sreclaimable, sunreclaim; 45 int lru; 46 unsigned long nr_purg_active = 0; 47 unsigned long nr_purg_inactive = 0; 48#ifdef CONFIG_MEM_PURGEABLE 49 unsigned long nr_purg_pined = 0; 50#endif 51 52 si_meminfo(&i); 53 si_swapinfo(&i); 54 committed = vm_memory_committed(); 55 56 cached = global_node_page_state(NR_FILE_PAGES) - 57 total_swapcache_pages() - i.bufferram; 58 if (cached < 0) 59 cached = 0; 60 61 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) 62 pages[lru] = global_node_page_state(NR_LRU_BASE + lru); 63 64#ifdef CONFIG_MEM_PURGEABLE 65 nr_purg_active = pages[LRU_ACTIVE_PURGEABLE]; 66 nr_purg_inactive = pages[LRU_INACTIVE_PURGEABLE]; 67 purg_pages_info(NULL, &nr_purg_pined); 68 nr_purg_pined = min(nr_purg_pined, nr_purg_active + nr_purg_inactive); 69#endif 70 71 available = si_mem_available(); 72 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B); 73 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B); 74 75 show_val_kb(m, "MemTotal: ", i.totalram); 76 show_val_kb(m, "MemFree: ", i.freeram); 77 show_val_kb(m, "MemAvailable: ", available); 78 show_val_kb(m, "Buffers: ", i.bufferram); 79 show_val_kb(m, "Cached: ", cached); 80 show_val_kb(m, "SwapCached: ", total_swapcache_pages()); 81 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] + 82#ifdef CONFIG_MEM_PURGEABLE 83 pages[LRU_ACTIVE_FILE] + 84 nr_purg_active); 85#else 86 pages[LRU_ACTIVE_FILE]); 87#endif 88 89 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] + 90 pages[LRU_INACTIVE_FILE] + 91 nr_purg_inactive); 92 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]); 93 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]); 94 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]); 95 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]); 96#ifdef CONFIG_MEM_PURGEABLE 97 show_val_kb(m, "Active(purg): ", nr_purg_active); 98 show_val_kb(m, "Inactive(purg): ", nr_purg_inactive); 99 show_val_kb(m, "Pined(purg): ", nr_purg_pined); 100#endif 101 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]); 102 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK)); 103 104#ifdef CONFIG_HIGHMEM 105 show_val_kb(m, "HighTotal: ", i.totalhigh); 106 show_val_kb(m, "HighFree: ", i.freehigh); 107 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh); 108 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh); 109#endif 110 111#ifndef CONFIG_MMU 112 show_val_kb(m, "MmapCopy: ", 113 (unsigned long)atomic_long_read(&mmap_pages_allocated)); 114#endif 115 116 show_val_kb(m, "SwapTotal: ", i.totalswap); 117 show_val_kb(m, "SwapFree: ", i.freeswap); 118#ifdef CONFIG_ZSWAP 119 seq_printf(m, "Zswap: %8lu kB\n", 120 (unsigned long)(zswap_pool_total_size >> 10)); 121 seq_printf(m, "Zswapped: %8lu kB\n", 122 (unsigned long)atomic_read(&zswap_stored_pages) << 123 (PAGE_SHIFT - 10)); 124#endif 125 show_val_kb(m, "Dirty: ", 126 global_node_page_state(NR_FILE_DIRTY)); 127 show_val_kb(m, "Writeback: ", 128 global_node_page_state(NR_WRITEBACK)); 129 show_val_kb(m, "AnonPages: ", 130 global_node_page_state(NR_ANON_MAPPED)); 131 show_val_kb(m, "Mapped: ", 132 global_node_page_state(NR_FILE_MAPPED)); 133 show_val_kb(m, "Shmem: ", i.sharedram); 134 show_val_kb(m, "KReclaimable: ", sreclaimable + 135 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE)); 136 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim); 137 show_val_kb(m, "SReclaimable: ", sreclaimable); 138 show_val_kb(m, "SUnreclaim: ", sunreclaim); 139 seq_printf(m, "KernelStack: %8lu kB\n", 140 global_node_page_state(NR_KERNEL_STACK_KB)); 141#ifdef CONFIG_SHADOW_CALL_STACK 142 seq_printf(m, "ShadowCallStack:%8lu kB\n", 143 global_node_page_state(NR_KERNEL_SCS_KB)); 144#endif 145 show_val_kb(m, "PageTables: ", 146 global_node_page_state(NR_PAGETABLE)); 147 show_val_kb(m, "SecPageTables: ", 148 global_node_page_state(NR_SECONDARY_PAGETABLE)); 149 150 show_val_kb(m, "NFS_Unstable: ", 0); 151 show_val_kb(m, "Bounce: ", 152 global_zone_page_state(NR_BOUNCE)); 153 show_val_kb(m, "WritebackTmp: ", 154 global_node_page_state(NR_WRITEBACK_TEMP)); 155 show_val_kb(m, "CommitLimit: ", vm_commit_limit()); 156 show_val_kb(m, "Committed_AS: ", committed); 157 seq_printf(m, "VmallocTotal: %8lu kB\n", 158 (unsigned long)VMALLOC_TOTAL >> 10); 159 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages()); 160 show_val_kb(m, "VmallocChunk: ", 0ul); 161 show_val_kb(m, "Percpu: ", pcpu_nr_pages()); 162 163 memtest_report_meminfo(m); 164 165#ifdef CONFIG_MEMORY_FAILURE 166 seq_printf(m, "HardwareCorrupted: %5lu kB\n", 167 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)); 168#endif 169 170#ifdef CONFIG_TRANSPARENT_HUGEPAGE 171 show_val_kb(m, "AnonHugePages: ", 172 global_node_page_state(NR_ANON_THPS)); 173 show_val_kb(m, "ShmemHugePages: ", 174 global_node_page_state(NR_SHMEM_THPS)); 175 show_val_kb(m, "ShmemPmdMapped: ", 176 global_node_page_state(NR_SHMEM_PMDMAPPED)); 177 show_val_kb(m, "FileHugePages: ", 178 global_node_page_state(NR_FILE_THPS)); 179 show_val_kb(m, "FilePmdMapped: ", 180 global_node_page_state(NR_FILE_PMDMAPPED)); 181#endif 182 183#ifdef CONFIG_CMA 184 show_val_kb(m, "CmaTotal: ", totalcma_pages); 185 show_val_kb(m, "CmaFree: ", 186 global_zone_page_state(NR_FREE_CMA_PAGES)); 187#endif 188 189#ifdef CONFIG_UNACCEPTED_MEMORY 190 show_val_kb(m, "Unaccepted: ", 191 global_zone_page_state(NR_UNACCEPTED)); 192#endif 193 194 hugetlb_report_meminfo(m); 195 196 arch_report_meminfo(m); 197 198 return 0; 199} 200 201static int __init proc_meminfo_init(void) 202{ 203 struct proc_dir_entry *pde; 204 205 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show); 206 pde_make_permanent(pde); 207 return 0; 208} 209fs_initcall(proc_meminfo_init); 210