LCOV - code coverage report
Current view: top level - fs/proc - meminfo.c (source / functions) Hit Total Coverage
Test: gcov_data_raspi2_real_modules_combined.info Lines: 62 62 100.0 %
Date: 2020-09-30 20:25:40 Functions: 4 4 100.0 %
Branches: 3 4 75.0 %

           Branch data     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 <asm/pgtable.h>
      21                 :            : #include "internal.h"
      22                 :            : 
      23                 :        207 : void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
      24                 :            : {
      25                 :        207 : }
      26                 :            : 
      27                 :       7452 : static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
      28                 :            : {
      29                 :       7452 :         seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
      30                 :       7452 :         seq_write(m, " kB\n", 4);
      31                 :       7452 : }
      32                 :            : 
      33                 :        207 : 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                 :        207 :         si_meminfo(&i);
      44                 :        207 :         si_swapinfo(&i);
      45                 :        207 :         committed = percpu_counter_read_positive(&vm_committed_as);
      46                 :            : 
      47                 :        414 :         cached = global_node_page_state(NR_FILE_PAGES) -
      48                 :        414 :                         total_swapcache_pages() - i.bufferram;
      49         [ -  + ]:        207 :         if (cached < 0)
      50                 :            :                 cached = 0;
      51                 :            : 
      52         [ +  + ]:       1242 :         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
      53                 :       2070 :                 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
      54                 :            : 
      55                 :        207 :         available = si_mem_available();
      56                 :            :         sreclaimable = global_node_page_state(NR_SLAB_RECLAIMABLE);
      57                 :            :         sunreclaim = global_node_page_state(NR_SLAB_UNRECLAIMABLE);
      58                 :            : 
      59                 :        207 :         show_val_kb(m, "MemTotal:       ", i.totalram);
      60                 :        207 :         show_val_kb(m, "MemFree:        ", i.freeram);
      61                 :        207 :         show_val_kb(m, "MemAvailable:   ", available);
      62                 :        207 :         show_val_kb(m, "Buffers:        ", i.bufferram);
      63                 :        207 :         show_val_kb(m, "Cached:         ", cached);
      64                 :        207 :         show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
      65                 :        414 :         show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
      66                 :        207 :                                            pages[LRU_ACTIVE_FILE]);
      67                 :        414 :         show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
      68                 :        207 :                                            pages[LRU_INACTIVE_FILE]);
      69                 :        207 :         show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
      70                 :        207 :         show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
      71                 :        207 :         show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
      72                 :        207 :         show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
      73                 :        207 :         show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
      74                 :        207 :         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                 :        207 :         show_val_kb(m, "SwapTotal:      ", i.totalswap);
      89                 :        207 :         show_val_kb(m, "SwapFree:       ", i.freeswap);
      90                 :        207 :         show_val_kb(m, "Dirty:          ",
      91                 :            :                     global_node_page_state(NR_FILE_DIRTY));
      92                 :        207 :         show_val_kb(m, "Writeback:      ",
      93                 :            :                     global_node_page_state(NR_WRITEBACK));
      94                 :        207 :         show_val_kb(m, "AnonPages:      ",
      95                 :            :                     global_node_page_state(NR_ANON_MAPPED));
      96                 :        207 :         show_val_kb(m, "Mapped:         ",
      97                 :            :                     global_node_page_state(NR_FILE_MAPPED));
      98                 :        207 :         show_val_kb(m, "Shmem:          ", i.sharedram);
      99                 :        207 :         show_val_kb(m, "KReclaimable:   ", sreclaimable +
     100                 :            :                     global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
     101                 :        207 :         show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
     102                 :        207 :         show_val_kb(m, "SReclaimable:   ", sreclaimable);
     103                 :        207 :         show_val_kb(m, "SUnreclaim:     ", sunreclaim);
     104                 :        207 :         seq_printf(m, "KernelStack:    %8lu kB\n",
     105                 :            :                    global_zone_page_state(NR_KERNEL_STACK_KB));
     106                 :        207 :         show_val_kb(m, "PageTables:     ",
     107                 :            :                     global_zone_page_state(NR_PAGETABLE));
     108                 :            : 
     109                 :        207 :         show_val_kb(m, "NFS_Unstable:   ",
     110                 :            :                     global_node_page_state(NR_UNSTABLE_NFS));
     111                 :        207 :         show_val_kb(m, "Bounce:         ",
     112                 :            :                     global_zone_page_state(NR_BOUNCE));
     113                 :        207 :         show_val_kb(m, "WritebackTmp:   ",
     114                 :            :                     global_node_page_state(NR_WRITEBACK_TEMP));
     115                 :        207 :         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
     116                 :        207 :         show_val_kb(m, "Committed_AS:   ", committed);
     117                 :        207 :         seq_printf(m, "VmallocTotal:   %8lu kB\n",
     118                 :        207 :                    (unsigned long)VMALLOC_TOTAL >> 10);
     119                 :        207 :         show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
     120                 :        207 :         show_val_kb(m, "VmallocChunk:   ", 0ul);
     121                 :        207 :         show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
     122                 :            : 
     123                 :            : #ifdef CONFIG_MEMORY_FAILURE
     124                 :            :         seq_printf(m, "HardwareCorrupted: %5lu kB\n",
     125                 :            :                    atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
     126                 :            : #endif
     127                 :            : 
     128                 :            : #ifdef CONFIG_TRANSPARENT_HUGEPAGE
     129                 :            :         show_val_kb(m, "AnonHugePages:  ",
     130                 :            :                     global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
     131                 :            :         show_val_kb(m, "ShmemHugePages: ",
     132                 :            :                     global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
     133                 :            :         show_val_kb(m, "ShmemPmdMapped: ",
     134                 :            :                     global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
     135                 :            :         show_val_kb(m, "FileHugePages:  ",
     136                 :            :                     global_node_page_state(NR_FILE_THPS) * HPAGE_PMD_NR);
     137                 :            :         show_val_kb(m, "FilePmdMapped:  ",
     138                 :            :                     global_node_page_state(NR_FILE_PMDMAPPED) * HPAGE_PMD_NR);
     139                 :            : #endif
     140                 :            : 
     141                 :            : #ifdef CONFIG_CMA
     142                 :        207 :         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
     143                 :        207 :         show_val_kb(m, "CmaFree:        ",
     144                 :            :                     global_zone_page_state(NR_FREE_CMA_PAGES));
     145                 :            : #endif
     146                 :            : 
     147                 :            :         hugetlb_report_meminfo(m);
     148                 :            : 
     149                 :        207 :         arch_report_meminfo(m);
     150                 :            : 
     151                 :        207 :         return 0;
     152                 :            : }
     153                 :            : 
     154                 :        207 : static int __init proc_meminfo_init(void)
     155                 :            : {
     156                 :        207 :         proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
     157                 :        207 :         return 0;
     158                 :            : }
     159                 :            : fs_initcall(proc_meminfo_init);

Generated by: LCOV version 1.14