fs/proc/meminfo.c

   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 <asm/page.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 = vm_memory_committed();
  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_pages(NR_SLAB_RECLAIMABLE_B);
  57         sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
  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 #ifdef CONFIG_ZSWAP
  91         seq_printf(m,  "Zswap:          %8lu kB\n",
  92                    (unsigned long)(zswap_pool_total_size >> 10));
  93         seq_printf(m,  "Zswapped:       %8lu kB\n",
  94                    (unsigned long)atomic_read(&zswap_stored_pages) <<
  95                    (PAGE_SHIFT - 10));
  96 #endif
  97         show_val_kb(m, "Dirty:          ",
  98                     global_node_page_state(NR_FILE_DIRTY));
  99         show_val_kb(m, "Writeback:      ",
 100                     global_node_page_state(NR_WRITEBACK));
 101         show_val_kb(m, "AnonPages:      ",
 102                     global_node_page_state(NR_ANON_MAPPED));
 103         show_val_kb(m, "Mapped:         ",
 104                     global_node_page_state(NR_FILE_MAPPED));
 105         show_val_kb(m, "Shmem:          ", i.sharedram);
 106         show_val_kb(m, "KReclaimable:   ", sreclaimable +
 107                     global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
 108         show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
 109         show_val_kb(m, "SReclaimable:   ", sreclaimable);
 110         show_val_kb(m, "SUnreclaim:     ", sunreclaim);
 111         seq_printf(m, "KernelStack:    %8lu kB\n",
 112                    global_node_page_state(NR_KERNEL_STACK_KB));
 113 #ifdef CONFIG_SHADOW_CALL_STACK
 114         seq_printf(m, "ShadowCallStack:%8lu kB\n",
 115                    global_node_page_state(NR_KERNEL_SCS_KB));
 116 #endif
 117         show_val_kb(m, "PageTables:     ",
 118                     global_node_page_state(NR_PAGETABLE));
 119         show_val_kb(m, "SecPageTables:  ",
 120                     global_node_page_state(NR_SECONDARY_PAGETABLE));
 121
 122         show_val_kb(m, "NFS_Unstable:   ", 0);
 123         show_val_kb(m, "Bounce:         ",
 124                     global_zone_page_state(NR_BOUNCE));
 125         show_val_kb(m, "WritebackTmp:   ",
 126                     global_node_page_state(NR_WRITEBACK_TEMP));
 127         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
 128         show_val_kb(m, "Committed_AS:   ", committed);
 129         seq_printf(m, "VmallocTotal:   %8lu kB\n",
 130                    (unsigned long)VMALLOC_TOTAL >> 10);
 131         show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
 132         show_val_kb(m, "VmallocChunk:   ", 0ul);
 133         show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
 134
 135 #ifdef CONFIG_MEMTEST
 136         if (early_memtest_done) {
 137                 unsigned long early_memtest_bad_size_kb;
 138
 139                 early_memtest_bad_size_kb = early_memtest_bad_size>>10;
 140                 if (early_memtest_bad_size && !early_memtest_bad_size_kb)
 141                         early_memtest_bad_size_kb = 1;
 142                 /* When 0 is reported, it means there actually was a successful test */
 143                 seq_printf(m, "EarlyMemtestBad:   %5lu kB\n", early_memtest_bad_size_kb);
 144         }
 145 #endif
 146
 147 #ifdef CONFIG_MEMORY_FAILURE
 148         seq_printf(m, "HardwareCorrupted: %5lu kB\n",
 149                    atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
 150 #endif
 151
 152 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 153         show_val_kb(m, "AnonHugePages:  ",
 154                     global_node_page_state(NR_ANON_THPS));
 155         show_val_kb(m, "ShmemHugePages: ",
 156                     global_node_page_state(NR_SHMEM_THPS));
 157         show_val_kb(m, "ShmemPmdMapped: ",
 158                     global_node_page_state(NR_SHMEM_PMDMAPPED));
 159         show_val_kb(m, "FileHugePages:  ",
 160                     global_node_page_state(NR_FILE_THPS));
 161         show_val_kb(m, "FilePmdMapped:  ",
 162                     global_node_page_state(NR_FILE_PMDMAPPED));
 163 #endif
 164
 165 #ifdef CONFIG_CMA
 166         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
 167         show_val_kb(m, "CmaFree:        ",
 168                     global_zone_page_state(NR_FREE_CMA_PAGES));
 169 #endif
 170
 171 #ifdef CONFIG_UNACCEPTED_MEMORY
 172         show_val_kb(m, "Unaccepted:     ",
 173                     global_zone_page_state(NR_UNACCEPTED));
 174 #endif
 175
 176         hugetlb_report_meminfo(m);
 177
 178         arch_report_meminfo(m);
 179
 180         return 0;
 181 }
 182
 183 static int __init proc_meminfo_init(void)
 184 {
 185         struct proc_dir_entry *pde;
 186
 187         pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
 188         pde_make_permanent(pde);
 189         return 0;
 190 }
 191 fs_initcall(proc_meminfo_init);