Eric Lee / smarc-fsl-linux-kernel

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lib/show_mem.c 1.39 KB
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454c63b02   Johannes Weiner   lib: generic show... 
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  /*
   * Generic show_mem() implementation
   *
   * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
   * All code subject to the GPL version 2.
   */
  
  #include <linux/mm.h>
  #include <linux/nmi.h>
  #include <linux/quicklist.h>
  
  void show_mem(void)
  {
  	pg_data_t *pgdat;
  	unsigned long total = 0, reserved = 0, shared = 0,
  		nonshared = 0, highmem = 0;
  
  	printk(KERN_INFO "Mem-Info:
  ");
  	show_free_areas();
  
  	for_each_online_pgdat(pgdat) {
  		unsigned long i, flags;
  
  		pgdat_resize_lock(pgdat, &flags);
  		for (i = 0; i < pgdat->node_spanned_pages; i++) {
  			struct page *page;
  			unsigned long pfn = pgdat->node_start_pfn + i;
  
  			if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
  				touch_nmi_watchdog();
  
  			if (!pfn_valid(pfn))
  				continue;
  
  			page = pfn_to_page(pfn);
  
  			if (PageHighMem(page))
  				highmem++;
  
  			if (PageReserved(page))
  				reserved++;
  			else if (page_count(page) == 1)
  				nonshared++;
  			else if (page_count(page) > 1)
  				shared += page_count(page) - 1;
  
  			total++;
  		}
  		pgdat_resize_unlock(pgdat, &flags);
  	}
  
  	printk(KERN_INFO "%lu pages RAM
  ", total);
  #ifdef CONFIG_HIGHMEM
  	printk(KERN_INFO "%lu pages HighMem
  ", highmem);
  #endif
  	printk(KERN_INFO "%lu pages reserved
  ", reserved);
  	printk(KERN_INFO "%lu pages shared
  ", shared);
  	printk(KERN_INFO "%lu pages non-shared
  ", nonshared);
  #ifdef CONFIG_QUICKLIST
  	printk(KERN_INFO "%lu pages in pagetable cache
  ",
  		quicklist_total_size());
  #endif
  }