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 <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         show_val_kb(m, "Zswap:          ", zswap_total_pages());
  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         memtest_report_meminfo(m);
 136
 137 #ifdef CONFIG_MEMORY_FAILURE
 138         seq_printf(m, "HardwareCorrupted: %5lu kB\n",
 139                    atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
 140 #endif
 141
 142 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 143         show_val_kb(m, "AnonHugePages:  ",
 144                     global_node_page_state(NR_ANON_THPS));
 145         show_val_kb(m, "ShmemHugePages: ",
 146                     global_node_page_state(NR_SHMEM_THPS));
 147         show_val_kb(m, "ShmemPmdMapped: ",
 148                     global_node_page_state(NR_SHMEM_PMDMAPPED));
 149         show_val_kb(m, "FileHugePages:  ",
 150                     global_node_page_state(NR_FILE_THPS));
 151         show_val_kb(m, "FilePmdMapped:  ",
 152                     global_node_page_state(NR_FILE_PMDMAPPED));
 153 #endif
 154
 155 #ifdef CONFIG_CMA
 156         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
 157         show_val_kb(m, "CmaFree:        ",
 158                     global_zone_page_state(NR_FREE_CMA_PAGES));
 159 #endif
 160
 161 #ifdef CONFIG_UNACCEPTED_MEMORY
 162         show_val_kb(m, "Unaccepted:     ",
 163                     global_zone_page_state(NR_UNACCEPTED));
 164 #endif
 165
 166         hugetlb_report_meminfo(m);
 167
 168         arch_report_meminfo(m);
 169
 170         return 0;
 171 }
 172
 173 static int __init proc_meminfo_init(void)
 174 {
 175         struct proc_dir_entry *pde;
 176
 177         pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
 178         pde_make_permanent(pde);
 179         return 0;
 180 }
 181 fs_initcall(proc_meminfo_init);