Line data    Source code

       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           0 : void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
      24             : {
      25           0 : }
      26             : 
      27           0 : static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
      28             : {
      29           0 :         seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
      30           0 :         seq_write(m, " kB\n", 4);
      31           0 : }
      32             : 
      33           0 : 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           0 :         si_meminfo(&i);
      44           0 :         si_swapinfo(&i);
      45           0 :         committed = vm_memory_committed();
      46             : 
      47           0 :         cached = global_node_page_state(NR_FILE_PAGES) -
      48           0 :                         total_swapcache_pages() - i.bufferram;
      49           0 :         if (cached < 0)
      50           0 :                 cached = 0;
      51             : 
      52           0 :         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
      53           0 :                 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
      54             : 
      55           0 :         available = si_mem_available();
      56           0 :         sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
      57           0 :         sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
      58             : 
      59           0 :         show_val_kb(m, "MemTotal:       ", i.totalram);
      60           0 :         show_val_kb(m, "MemFree:        ", i.freeram);
      61           0 :         show_val_kb(m, "MemAvailable:   ", available);
      62           0 :         show_val_kb(m, "Buffers:        ", i.bufferram);
      63           0 :         show_val_kb(m, "Cached:         ", cached);
      64           0 :         show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
      65           0 :         show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
      66           0 :                                            pages[LRU_ACTIVE_FILE]);
      67           0 :         show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
      68           0 :                                            pages[LRU_INACTIVE_FILE]);
      69           0 :         show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
      70           0 :         show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
      71           0 :         show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
      72           0 :         show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
      73           0 :         show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
      74           0 :         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           0 :         show_val_kb(m, "SwapTotal:      ", i.totalswap);
      89           0 :         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           0 :         show_val_kb(m, "Dirty:          ",
      98             :                     global_node_page_state(NR_FILE_DIRTY));
      99           0 :         show_val_kb(m, "Writeback:      ",
     100             :                     global_node_page_state(NR_WRITEBACK));
     101           0 :         show_val_kb(m, "AnonPages:      ",
     102             :                     global_node_page_state(NR_ANON_MAPPED));
     103           0 :         show_val_kb(m, "Mapped:         ",
     104             :                     global_node_page_state(NR_FILE_MAPPED));
     105           0 :         show_val_kb(m, "Shmem:          ", i.sharedram);
     106           0 :         show_val_kb(m, "KReclaimable:   ", sreclaimable +
     107           0 :                     global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
     108           0 :         show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
     109           0 :         show_val_kb(m, "SReclaimable:   ", sreclaimable);
     110           0 :         show_val_kb(m, "SUnreclaim:     ", sunreclaim);
     111           0 :         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           0 :         show_val_kb(m, "PageTables:     ",
     118             :                     global_node_page_state(NR_PAGETABLE));
     119           0 :         show_val_kb(m, "SecPageTables:  ",
     120             :                     global_node_page_state(NR_SECONDARY_PAGETABLE));
     121             : 
     122           0 :         show_val_kb(m, "NFS_Unstable:   ", 0);
     123           0 :         show_val_kb(m, "Bounce:         ",
     124             :                     global_zone_page_state(NR_BOUNCE));
     125           0 :         show_val_kb(m, "WritebackTmp:   ",
     126             :                     global_node_page_state(NR_WRITEBACK_TEMP));
     127           0 :         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
     128           0 :         show_val_kb(m, "Committed_AS:   ", committed);
     129           0 :         seq_printf(m, "VmallocTotal:   %8lu kB\n",
     130           0 :                    (unsigned long)VMALLOC_TOTAL >> 10);
     131           0 :         show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
     132           0 :         show_val_kb(m, "VmallocChunk:   ", 0ul);
     133           0 :         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           0 :         hugetlb_report_meminfo(m);
     177             : 
     178           0 :         arch_report_meminfo(m);
     179             : 
     180           0 :         return 0;
     181             : }
     182             : 
     183           1 : static int __init proc_meminfo_init(void)
     184             : {
     185             :         struct proc_dir_entry *pde;
     186             : 
     187           1 :         pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
     188           1 :         pde_make_permanent(pde);
     189           1 :         return 0;
     190             : }
     191             : fs_initcall(proc_meminfo_init);