Quelle  meminfo.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/mman.h>
#include <linux/mmzone.h>
#include <linux/memblock.h>
#include <linux/proc_fs.h>
#include <linux/percpu.h>
#include <linux/seq_file.h>
#include <linux/swap.h>
#include <linux/vmstat.h>
#include <linux/atomic.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_CMA
#include <linux/cma.h>
#endif
#include <linux/zswap.h>
#include <asm/page.h>
#include "internal.h"

void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
{
}

static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
{
 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
 seq_write(m, " kB\n", 4);
}

static int meminfo_proc_show(struct seq_file *m, void *v)
{
 struct sysinfo i;
 unsigned long committed;
 long cached;
 long available;
 unsigned long pages[NR_LRU_LISTS];
 unsigned long sreclaimable, sunreclaim;
 int lru;

 si_meminfo(&i);
 si_swapinfo(&i);
 committed = vm_memory_committed();

 cached = global_node_page_state(NR_FILE_PAGES) -
   total_swapcache_pages() - i.bufferram;
 if (cached < 0)
  cached = 0;

 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
  pages[lru] = global_node_page_state(NR_LRU_BASE + lru);

 available = si_mem_available();
 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);

 show_val_kb(m, "MemTotal: ", i.totalram);
 show_val_kb(m, "MemFree: ", i.freeram);
 show_val_kb(m, "MemAvailable: ", available);
 show_val_kb(m, "Buffers: ", i.bufferram);
 show_val_kb(m, "Cached: ", cached);
 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
        pages[LRU_ACTIVE_FILE]);
 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
        pages[LRU_INACTIVE_FILE]);
 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));

#ifdef CONFIG_HIGHMEM
 show_val_kb(m, "HighTotal: ", i.totalhigh);
 show_val_kb(m, "HighFree: ", i.freehigh);
 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
#endif

#ifndef CONFIG_MMU
 show_val_kb(m, "MmapCopy: ",
      (unsigned long)atomic_long_read(&mmap_pages_allocated));
#endif

 show_val_kb(m, "SwapTotal: ", i.totalswap);
 show_val_kb(m, "SwapFree: ", i.freeswap);
#ifdef CONFIG_ZSWAP
 show_val_kb(m, "Zswap: ", zswap_total_pages());
 seq_printf(m,  "Zswapped: %8lu kB\n",
     (unsigned long)atomic_long_read(&zswap_stored_pages) <<
     (PAGE_SHIFT - 10));
#endif
 show_val_kb(m, "Dirty: ",
      global_node_page_state(NR_FILE_DIRTY));
 show_val_kb(m, "Writeback: ",
      global_node_page_state(NR_WRITEBACK));
 show_val_kb(m, "AnonPages: ",
      global_node_page_state(NR_ANON_MAPPED));
 show_val_kb(m, "Mapped: ",
      global_node_page_state(NR_FILE_MAPPED));
 show_val_kb(m, "Shmem: ", i.sharedram);
 show_val_kb(m, "KReclaimable: ", sreclaimable +
      global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
 show_val_kb(m, "SReclaimable: ", sreclaimable);
 show_val_kb(m, "SUnreclaim: ", sunreclaim);
 seq_printf(m, "KernelStack: %8lu kB\n",
     global_node_page_state(NR_KERNEL_STACK_KB));
#ifdef CONFIG_SHADOW_CALL_STACK
 seq_printf(m, "ShadowCallStack:%8lu kB\n",
     global_node_page_state(NR_KERNEL_SCS_KB));
#endif
 show_val_kb(m, "PageTables: ",
      global_node_page_state(NR_PAGETABLE));
 show_val_kb(m, "SecPageTables: ",
      global_node_page_state(NR_SECONDARY_PAGETABLE));

 show_val_kb(m, "NFS_Unstable: ", 0);
 show_val_kb(m, "Bounce: ", 0);
 show_val_kb(m, "WritebackTmp: ", 0);
 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
 show_val_kb(m, "Committed_AS: ", committed);
 seq_printf(m, "VmallocTotal: %8lu kB\n",
     (unsigned long)VMALLOC_TOTAL >> 10);
 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
 show_val_kb(m, "VmallocChunk: ", 0ul);
 show_val_kb(m, "Percpu: ", pcpu_nr_pages());

 memtest_report_meminfo(m);

#ifdef CONFIG_MEMORY_FAILURE
 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
     atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
#endif

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
 show_val_kb(m, "AnonHugePages: ",
      global_node_page_state(NR_ANON_THPS));
 show_val_kb(m, "ShmemHugePages: ",
      global_node_page_state(NR_SHMEM_THPS));
 show_val_kb(m, "ShmemPmdMapped: ",
      global_node_page_state(NR_SHMEM_PMDMAPPED));
 show_val_kb(m, "FileHugePages: ",
      global_node_page_state(NR_FILE_THPS));
 show_val_kb(m, "FilePmdMapped: ",
      global_node_page_state(NR_FILE_PMDMAPPED));
#endif

#ifdef CONFIG_CMA
 show_val_kb(m, "CmaTotal: ", totalcma_pages);
 show_val_kb(m, "CmaFree: ",
      global_zone_page_state(NR_FREE_CMA_PAGES));
#endif

#ifdef CONFIG_UNACCEPTED_MEMORY
 show_val_kb(m, "Unaccepted: ",
      global_zone_page_state(NR_UNACCEPTED));
#endif
 show_val_kb(m, "Balloon: ",
      global_node_page_state(NR_BALLOON_PAGES));

 hugetlb_report_meminfo(m);

 arch_report_meminfo(m);

 return 0;
}

static int __init proc_meminfo_init(void)
{
 struct proc_dir_entry *pde;

 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
 pde_make_permanent(pde);
 return 0;
}
fs_initcall(proc_meminfo_init);