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/proc_fs.h>
      10             : #include <linux/percpu.h>
      11             : #include <linux/seq_file.h>
      12             : #include <linux/swap.h>
      13             : #include <linux/vmstat.h>
      14             : #include <linux/atomic.h>
      15             : #include <linux/vmalloc.h>
      16             : #ifdef CONFIG_CMA
      17             : #include <linux/cma.h>
      18             : #endif
      19             : #include <asm/page.h>
      20             : #include "internal.h"
      21             : 
      22           0 : void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
      23             : {
      24           0 : }
      25             : 
      26           0 : static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
      27             : {
      28           0 :         seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
      29           0 :         seq_write(m, " kB\n", 4);
      30           0 : }
      31             : 
      32           0 : static int meminfo_proc_show(struct seq_file *m, void *v)
      33             : {
      34             :         struct sysinfo i;
      35             :         unsigned long committed;
      36             :         long cached;
      37             :         long available;
      38             :         unsigned long pages[NR_LRU_LISTS];
      39             :         unsigned long sreclaimable, sunreclaim;
      40             :         int lru;
      41             : 
      42           0 :         si_meminfo(&i);
      43           0 :         si_swapinfo(&i);
      44           0 :         committed = vm_memory_committed();
      45             : 
      46           0 :         cached = global_node_page_state(NR_FILE_PAGES) -
      47           0 :                         total_swapcache_pages() - i.bufferram;
      48           0 :         if (cached < 0)
      49           0 :                 cached = 0;
      50             : 
      51           0 :         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
      52           0 :                 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
      53             : 
      54           0 :         available = si_mem_available();
      55           0 :         sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
      56           0 :         sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
      57             : 
      58           0 :         show_val_kb(m, "MemTotal:       ", i.totalram);
      59           0 :         show_val_kb(m, "MemFree:        ", i.freeram);
      60           0 :         show_val_kb(m, "MemAvailable:   ", available);
      61           0 :         show_val_kb(m, "Buffers:        ", i.bufferram);
      62           0 :         show_val_kb(m, "Cached:         ", cached);
      63           0 :         show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
      64           0 :         show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
      65           0 :                                            pages[LRU_ACTIVE_FILE]);
      66           0 :         show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
      67           0 :                                            pages[LRU_INACTIVE_FILE]);
      68           0 :         show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
      69           0 :         show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
      70           0 :         show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
      71           0 :         show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
      72           0 :         show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
      73           0 :         show_val_kb(m, "Mlocked:        ", global_zone_page_state(NR_MLOCK));
      74             : 
      75             : #ifdef CONFIG_HIGHMEM
      76             :         show_val_kb(m, "HighTotal:      ", i.totalhigh);
      77             :         show_val_kb(m, "HighFree:       ", i.freehigh);
      78             :         show_val_kb(m, "LowTotal:       ", i.totalram - i.totalhigh);
      79             :         show_val_kb(m, "LowFree:        ", i.freeram - i.freehigh);
      80             : #endif
      81             : 
      82             : #ifndef CONFIG_MMU
      83             :         show_val_kb(m, "MmapCopy:       ",
      84             :                     (unsigned long)atomic_long_read(&mmap_pages_allocated));
      85             : #endif
      86             : 
      87           0 :         show_val_kb(m, "SwapTotal:      ", i.totalswap);
      88           0 :         show_val_kb(m, "SwapFree:       ", i.freeswap);
      89             : #ifdef CONFIG_ZSWAP
      90             :         seq_printf(m,  "Zswap:          %8lu kB\n",
      91             :                    (unsigned long)(zswap_pool_total_size >> 10));
      92             :         seq_printf(m,  "Zswapped:       %8lu kB\n",
      93             :                    (unsigned long)atomic_read(&zswap_stored_pages) <<
      94             :                    (PAGE_SHIFT - 10));
      95             : #endif
      96           0 :         show_val_kb(m, "Dirty:          ",
      97             :                     global_node_page_state(NR_FILE_DIRTY));
      98           0 :         show_val_kb(m, "Writeback:      ",
      99             :                     global_node_page_state(NR_WRITEBACK));
     100           0 :         show_val_kb(m, "AnonPages:      ",
     101             :                     global_node_page_state(NR_ANON_MAPPED));
     102           0 :         show_val_kb(m, "Mapped:         ",
     103             :                     global_node_page_state(NR_FILE_MAPPED));
     104           0 :         show_val_kb(m, "Shmem:          ", i.sharedram);
     105           0 :         show_val_kb(m, "KReclaimable:   ", sreclaimable +
     106           0 :                     global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
     107           0 :         show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
     108           0 :         show_val_kb(m, "SReclaimable:   ", sreclaimable);
     109           0 :         show_val_kb(m, "SUnreclaim:     ", sunreclaim);
     110           0 :         seq_printf(m, "KernelStack:    %8lu kB\n",
     111             :                    global_node_page_state(NR_KERNEL_STACK_KB));
     112             : #ifdef CONFIG_SHADOW_CALL_STACK
     113             :         seq_printf(m, "ShadowCallStack:%8lu kB\n",
     114             :                    global_node_page_state(NR_KERNEL_SCS_KB));
     115             : #endif
     116           0 :         show_val_kb(m, "PageTables:     ",
     117             :                     global_node_page_state(NR_PAGETABLE));
     118           0 :         show_val_kb(m, "SecPageTables:  ",
     119             :                     global_node_page_state(NR_SECONDARY_PAGETABLE));
     120             : 
     121           0 :         show_val_kb(m, "NFS_Unstable:   ", 0);
     122           0 :         show_val_kb(m, "Bounce:         ",
     123             :                     global_zone_page_state(NR_BOUNCE));
     124           0 :         show_val_kb(m, "WritebackTmp:   ",
     125             :                     global_node_page_state(NR_WRITEBACK_TEMP));
     126           0 :         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
     127           0 :         show_val_kb(m, "Committed_AS:   ", committed);
     128           0 :         seq_printf(m, "VmallocTotal:   %8lu kB\n",
     129           0 :                    (unsigned long)VMALLOC_TOTAL >> 10);
     130           0 :         show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
     131           0 :         show_val_kb(m, "VmallocChunk:   ", 0ul);
     132           0 :         show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
     133             : 
     134             : #ifdef CONFIG_MEMORY_FAILURE
     135             :         seq_printf(m, "HardwareCorrupted: %5lu kB\n",
     136             :                    atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
     137             : #endif
     138             : 
     139             : #ifdef CONFIG_TRANSPARENT_HUGEPAGE
     140             :         show_val_kb(m, "AnonHugePages:  ",
     141             :                     global_node_page_state(NR_ANON_THPS));
     142             :         show_val_kb(m, "ShmemHugePages: ",
     143             :                     global_node_page_state(NR_SHMEM_THPS));
     144             :         show_val_kb(m, "ShmemPmdMapped: ",
     145             :                     global_node_page_state(NR_SHMEM_PMDMAPPED));
     146             :         show_val_kb(m, "FileHugePages:  ",
     147             :                     global_node_page_state(NR_FILE_THPS));
     148             :         show_val_kb(m, "FilePmdMapped:  ",
     149             :                     global_node_page_state(NR_FILE_PMDMAPPED));
     150             : #endif
     151             : 
     152             : #ifdef CONFIG_CMA
     153             :         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
     154             :         show_val_kb(m, "CmaFree:        ",
     155             :                     global_zone_page_state(NR_FREE_CMA_PAGES));
     156             : #endif
     157             : 
     158           0 :         hugetlb_report_meminfo(m);
     159             : 
     160           0 :         arch_report_meminfo(m);
     161             : 
     162           0 :         return 0;
     163             : }
     164             : 
     165           1 : static int __init proc_meminfo_init(void)
     166             : {
     167             :         struct proc_dir_entry *pde;
     168             : 
     169           1 :         pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
     170           1 :         pde_make_permanent(pde);
     171           1 :         return 0;
     172             : }
     173             : fs_initcall(proc_meminfo_init);