show_mem.c

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    1 /*
    2  * Generic show_mem() implementation
    3  *
    4  * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
    5  * All code subject to the GPL version 2.
    6  */
    7 
    8 #include <linux/mm.h>
    9 #include <linux/nmi.h>
   10 #include <linux/quicklist.h>
   11 
   12 void show_mem(unsigned int filter)
   13 {
   14         pg_data_t *pgdat;
   15         unsigned long total = 0, reserved = 0, shared = 0,
   16                 nonshared = 0, highmem = 0;
   17 
   18         printk("Mem-Info:\n");
   19         show_free_areas(filter);
   20 
   21         for_each_online_pgdat(pgdat) {
   22                 unsigned long i, flags;
   23 
   24                 pgdat_resize_lock(pgdat, &flags);
   25                 for (i = 0; i < pgdat->node_spanned_pages; i++) {
   26                         struct page *page;
   27                         unsigned long pfn = pgdat->node_start_pfn + i;
   28 
   29                         if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
   30                                 touch_nmi_watchdog();
   31 
   32                         if (!pfn_valid(pfn))
   33                                 continue;
   34 
   35                         page = pfn_to_page(pfn);
   36 
   37                         if (PageHighMem(page))
   38                                 highmem++;
   39 
   40                         if (PageReserved(page))
   41                                 reserved++;
   42                         else if (page_count(page) == 1)
   43                                 nonshared++;
   44                         else if (page_count(page) > 1)
   45                                 shared += page_count(page) - 1;
   46 
   47                         total++;
   48                 }
   49                 pgdat_resize_unlock(pgdat, &flags);
   50         }
   51 
   52         printk("%lu pages RAM\n", total);
   53 #ifdef CONFIG_HIGHMEM
   54         printk("%lu pages HighMem\n", highmem);
   55 #endif
   56         printk("%lu pages reserved\n", reserved);
   57         printk("%lu pages shared\n", shared);
   58         printk("%lu pages non-shared\n", nonshared);
   59 #ifdef CONFIG_QUICKLIST
   60         printk("%lu pages in pagetable cache\n",
   61                 quicklist_total_size());
   62 #endif
   63 }

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FreeBSD/Linux Kernel Cross Reference sys/lib/show_mem.c

FreeBSD/Linux Kernel Cross Reference
sys/lib/show_mem.c